Guidance

Spotlight on sexually transmitted infections in Yorkshire and Humber: 2024 data

Updated 13 January 2026

Applies to England

Summary

This report primarily focuses on the trends of sexually transmitted infections (STIs) in Yorkshire and Humber between 2023 and 2024. Some trends relative to 2019 or earlier are included to provide a comparison to sexual health service provision and STI diagnoses prior to the COVID-19 pandemic in 2020 and 2021. For England, including Yorkshire and Humber, the numbers of consultations, sexual health screens and STI diagnoses in 2020 and 2021 are lower than preceding years and any trends during periods which include those years must be interpreted in that context.

STIs represent an important public health problem in Yorkshire and Humber. Of all the UK Health Security Agency (UKHSA)’s regions in 2024, Yorkshire and Humber had the fourth highest rate of new STIs in England, the same position as in 2023.

28,273 new STIs were diagnosed in Yorkshire and Humber residents in 2024, a rate of 505 diagnoses per 100,000 population. Rates by upper tier local authority ranged from 291 new STI diagnoses per 100,000 population in North Yorkshire to 692 new STI diagnoses per 100,000 population in Leeds.

The number of new STIs diagnosed in Yorkshire and Humber residents decreased by 14% between 2023 and 2024. A notable change was seen in gonorrhoea where cases decreased by 28% compared to 2023. Changes were also seen in the numbers of the other four major STIs: chlamydia decreased by 15%, genital herpes decreased by 3% and genital warts decreased by 9% but syphilis increased by 5%.

UKHSA recommends that local areas should be working towards achieving a chlamydia detection rate no lower than 3,250 per 100,000 among women aged 15 to 24 years and this is an indicator in the Public Health Outcomes Framework. In 2024, the chlamydia detection rate among Yorkshire and Humber women aged 15 to 24 years was 1,693 per 100,000 residents, this is a decrease from 2,200 per 100,000 in 2023 (1).

Rates of new STIs vary somewhat between men and women (466 and 485 per 100,000 residents, respectively). Where gender and sexual orientation are known, gay, bisexual and other men who have sex with men (GBMSM) account for 19% of Yorkshire and Humber residents diagnosed with a new STI (excluding chlamydia diagnoses reported via CTAD) in 2024; 67% of those diagnosed with syphilis and 40% of those diagnosed with gonorrhoea.

STIs disproportionately affect young people. Yorkshire and Humber residents aged between 15 and 24 years accounted for 47% of all new STI diagnoses in 2024. Despite this there has been a decrease in 2024 in new STI diagnoses in the 15 to 19 and 20 to 24 age groups, in line with the decrease in new gonorrhoea diagnoses. A steep decline was seen in genital warts diagnosis rates in females aged 15 to 19 years following the introduction in 2008 of vaccination for girls against human papillomavirus (HPV), the virus which causes genital warts. In recent years the overall rates of genital warts in have stablised and there was a 1% decrease in Yorkshire and Humber from 2020 to 2024.

The White ethnic group has the highest number of new STI diagnoses in Yorkshire and Humber: 19,275 (79.7%). Although only 1.2% of new STIs are in the Black Caribbean ethnic group, they have the second highest rate: 1,284 per 100,000, which is 3.1 times the rate seen in the White ethnic group (411 per 100,000). The highest rate of new STIs was seen in the Black African ethnic group at 1,369 per 100,000, which accounts for 4.6% of new STIs.

Where country of birth was known, 86% of Yorkshire and Humber residents diagnosed with a new STI in 2024 (excluding chlamydia diagnoses reported via CTAD) were UK-born.

Deprivation remains strongly associated with rates of STIs in Yorkshire and Humber. The rate of new STIs among people who lived in the most deprived areas (659 per 100,000) was 2.1 times higher than the rate for people who live in the least deprived areas (308 per 100,000).

Conclusion

The number of consultations at sexual health services (SHSs) in Yorkshire and Humber has decreased to 328,037 in 2024 from 348,960 in 2023. This decrease was seen in face-to-face, online and telephone appointments, with the largest decrease (16%) in the number of telephone consultations.

Overall, Yorkshire and Humber had the fourth highest rate of STIs in England (505.4 per 100,000) in 2024, which is a decrease compared to 2023 (584.1 per 100,000). The number of new STI diagnoses for four out of the five major STIs decreased in 2024, with the largest decrease seen in gonorrhoea (−28%). The number of syphilis diagnoses continue to increase and are 5% higher than 2023. This is generally consistent with what has been seen nationally in 2024 (2).

Diagnoses of STIs amongst GBMSM have decreased 8% since 2023, driven by a 15% decrease in gonorrhoea diagnoses and an 8% decrease in chlamydia diagnoses. Syphilis, genital herpes and genital warts diagnoses have all increased in the GBMSM population in 2024, by 3%, 1% and 2% respectively.

The highest rates of new diagnoses per 100,000 were seen in females aged 20 and 24 years and in the Black African ethnicity group. These groups may benefit from more targeted health promotion messaging.

Within Yorkshire and Humber, Leeds and North East Lincolnshire local authorities have the highest rates of new STI diagnoses at 692 and 644 per 100,000, respectively. These rates are higher than the England (631 per 100,000) average.

UKHSA’s main messages

Commissioners and providers of SHSs have an important role in communicating messages about safer sexual behaviours and how to access services. Main prevention messages include:

• using condoms consistently and correctly protects against HIV and other STIs such as chlamydia, gonorrhoea, and syphilis – condoms can also be used to prevent unplanned pregnancy
• regular screening for STIs and HIV is essential to maintain good sexual health – everyone should have an STI screen, including an HIV test, on at least an annual basis if having condomless sex with new or casual partners – and in addition:
  • women, and other people with a womb and ovaries, aged under 25 years who are sexually active should have a chlamydia test annually and on change of sexual partner
  • gay, bisexual and other men who have sex with men (GBMSM) should have tests for HIV and STIs annually or every 3 months if having condomless sex with new or casual partners
• Doxycycline post-exposure prophylaxis (doxyPEP) is recommended to people at risk of syphilis to reduce their risk of infection – doxyPEP is available at specialist SHSs
• HIV pre-exposure prophylaxis (PrEP) is available for free from specialist SHSs and can be used to reduce an individual’s risk of acquiring HIV
• HIV post-exposure prophylaxis (PEP) can be used to reduce the risk of acquiring HIV following some sexual exposures – PEP is available for free from most specialist SHSs and most emergency departments
• people living with diagnosed HIV who are on treatment and have an undetectable viral load are unable to pass on the infection to others during sex – this is known as ‘Undetectable=Untransmittable’ or ‘U=U’
• vaccination against human papillomavirus (HPV), hepatitis A and hepatitis B will protect against disease caused by these viruses and prevent the spread of these infections:
  • GBMSM can obtain the hepatitis A and hepatitis B vaccines from specialist SHSs – these vaccines are also available for other people at high risk of exposure to the viruses
  • GBMSM aged up to and including 45 years can obtain the HPV vaccine from specialist SHSs
  • GBMSM who have a recent history of multiple sexual partners or an STI and other high risk groups are eligible for a meningococcal B disease vaccine (4CMenB) which can protect against gonorrhoea and help tackle the increasing levels of antibiotic resistant strains of the disease
  • Mpox vaccination is available for those at increased risk, including GBMSM who have a recent history of multiple sexual partners
• specialist SHSs are free and confidential and offer testing and treatment for HIV and STIs, condoms, vaccination, HIV PrEP and PEP:
  • clinic-based services are commissioned for residents of all areas in England
  • online self-sampling for HIV and STIs is widely available
  • information and advice about sexual health including how to access services is available at NHS.UK (https://www.nhs.uk/nhs-services/sexual-health-services/) and from the national sexual health helpline on 0300 123 7123

Charts, tables and maps

Figure 1. New STI diagnosis rates by UKHSA region of residence, England, 2024

Data sources: GUMCAD, CTAD

Figure 1 is a bar chart showing that London reported the highest rate of new STI diagnoses per 100,000 population in 2024, followed by the North West and North East. Yorkshire and Humber has the fourth highest rate of new STI diagnoses (505.4 per 100,000).

Figure 2. Number of diagnoses of the 5 main STIs, Yorkshire and Humber residents, 2020 to 2024

Data sources: GUMCAD, CTAD

It is important to consider whether there have been any changes to testing or vaccination practices when interpreting increases or decreases in STIs:

• any increase in gonorrhoea diagnoses may be due to the increased use of highly sensitive nucleic acid amplification tests (NAATs) and additional screening of extra-genital sites in GBMSM.

• any decrease in genital wart diagnoses may be due to a moderately protective effect of HPV-16/18 vaccination.

• any increase in genital herpes diagnoses may be due to the use of more sensitive NAATs

• increases or decreases may also reflect changes in testing practices

Figure 2 is a line graph which shows that of the five STIs presented, 4 have seen a decrease in new diagnoses between 2023 and 2024 (gonorrhoea, chlamydia, genital herpes and genital warts). Syphilis diagnoses have increased between 2023 and 2024, though continue to have the fewest diagnoses of the major STIs. Changes in diagnoses over the 5 year period should be interpreted with caution due to the COVID-19 pandemic affecting data in 2020 and 2021.

Table 1: Percentage change in new STI diagnoses, Yorkshire and Humber residents

Data sources: GUMCAD, CTAD

Diagnoses	2024	Percentage change 2020 to 2024	Percentage change 2023 to 2024
Chlamydia	15,180	3%	−15%
Genital Herpes	2,261	23%	−3%
Genital Warts	2,062	-1%	−9%
Gonorrhoea	4,408	50%	−28%
Syphilis	494	98%	5%
Other	3,868	43%	2%
All new STIs	28,273	15%	−14%

See notes for Figure 2. See New STIs section for a list of diagnoses that are included in the other STIs.

Table 1 summarises the changes seen in the previous chart and shows more clearly the changes in less common STIs such as syphilis. Table 1 shows that between 2023 and 2024 new STI diagnoses decreased by 14%. Percentage changes between 2023 and 2024 for each STI were varied, with the greatest changes being a 28% decrease for gonorrhoea and 15% decrease for chlamydia. Only diagnoses for syphilis and other STIs increased between 2023 and 2024 (+5% and +2%).

Over the 5 year period from 2020 to 2024 there have been more substantial changes. Notable increases were seen in the number of diagnoses of syphilis and gonorrhoea (+98% and +50%). It is important to note the impact of COVID-19 on sexual health services and individuals behaviour during this time period.

Figure 3. Rates of new STIs per 100,000 Yorkshire and Humber residents by age group (for those aged 15 to 64 years only) and gender, 2024

Data sources: GUMCAD, CTAD

Figure 3 is a bar chart which shows that rates of new STIs per 100,000 population in Yorkshire and Humber in 2024 were highest in those aged 24 years and under. Females aged 20 to 24 years reported the highest rate of new STIs.

Figure 4. Rates of gonorrhoea per 100,000 Yorkshire and Humber residents by age group [note 1] (for those aged 15 to 64 years only), 2020 to 2024

Data sources: GUMCAD

Note 1: Age-specific rates are shown for those aged 15 to 64 years only.

Figure 4 is a line graph which shows that between 2020 and 2024, rates of gonorrhoea per 100,000 have increased across all age groups. Between 2022 and 2024 there have been decreases in the rates of gonorrhoea for the 15 to 19, 20 to 24 and 25 to 34 year age groups.

Figure 5. Rates of genital warts per 100,000 Yorkshire and Humber residents aged 15 to 19 years by gender, 2020 to 2024

Data sources: GUMCAD

Figure 5 is a line graph which shows that the rates of genital warts per 100,000 are similar in males and females and have remained stable and low since 2020 and are currently 8.0 per 100,000 in males and 12.7 per 100,000 in females.

Figure 6. Rates of new STIs per 100,000 Yorkshire and Humber residents by ethnic group, 2024

Data sources: GUMCAD, CTAD

Figure 6 is a bar chart which shows that the rate of new STIs per 100,000 is highest in the Black African ethnicity group at 1369.4 per 100,000 population. The second highest is Black Caribbean at 1284.2 per 100,000.

Table 2. Percentage of new STI diagnoses among Yorkshire and Humber residents by ethnic group, 2024

Data sources: GUMCAD, CTAD

Ethnic group	Number	Percentage (excluding unknown)
All other ethnic groups combined	3,503	14.5%
Black African	1,108	4.6%
Black Caribbean	292	1.2%
White	19,275	79.7%
unknown	4,095

Table 2 shows that of the 24,178 new STI diagnoses where the ethnic group was provided, the majority were in people of White ethnicity, followed by all other ethnic groups combined (79.7% and 14.5% respectively). Ethnicity was not recorded for 4,095 new diagnoses, highlighting the need to improve the collection of ethnicity data.

Figure 7. Percentage of Yorkshire and Humber residents diagnosed with a new STI by world region of birth [note 2], 2024

Data sources: GUMCAD data only

Note 2: Data on country of birth is not collected by CTAD. All information about world region of birth is based on diagnoses made in specialist and non-specialist services which report to GUMCAD.

Figure 7 is a bar chart which shows that the majority (86%) of those diagnosed with a new STI in 2024 were born in the UK.

Figure 8. Rates of new STIs per 100,000 Yorkshire and Humber residents by decile of deprivation [note 3], 2024

Data sources: GUMCAD, CTAD

Note 3: Deciles run from 1 to 10 in order of decreasing deprivation, with 1 being the decile for the most deprived area.

Figure 8 is a bar chart which shows that the rate of new STI diagnoses per 100,000 population decreases with the decile of deprivation. Those in decile 1 have the highest rate of new STI diagnoses at 659 per 100,000, whilst those in decile 10 have the lowest rate of 308 per 100,000.

Figure 9. Diagnoses of the 5 main STIs among GBMSM [note 4], Yorkshire and Humber residents, 2020 to 2024

Data sources: GUMCAD data only

Note 4: Data on sexual orientation is not collected by CTAD. All information about GBMSM is based on diagnoses made in specialist and non-specialist services which report to GUMCAD and exclude chlamydia diagnoses via online services.

Note: It is important to consider whether there have been any changes to testing or vaccination practices when interpreting increases or decreases in STIs:

• increases in gonorrhoea may be due to the increased use of highly sensitive nucleic acid amplification tests (NAATs) and additional screening of extra-genital sites in GBMSM

• decreases in genital wart diagnoses may be due to the moderately protective effect of HPV-16/18 vaccination

• increases in genital herpes diagnoses may be due to the use of more sensitive NAATs

Figure 9 is a line graph which shows that the trend in numbers of each main STI for GBMSM has increased between 2020 and 2024. This should be interpreted with caution due to the impact of the COVID-19 pandemic. Between 2023 and 2024 the number of diagnoses for gonorrhoea and chlamydia have both decreased.

Table 3. Percentage change in new STI diagnoses in GBMSM (see notes for Figure 9) residents in Yorkshire and Humber

Data sources: GUMCAD data only

Diagnoses	2023	2024	Percentage change 2023 to 2024
Chlamydia	1,002	925	−8%
Genital Herpes	104	105	1%
Genital Warts	110	112	2%
Gonorrhoea	1,695	1,435	−15%
Syphilis	265	274	3%
Other	330	376	14%
All new STIs	3,506	3,227	−8%

See New STIs section for a list of diagnoses that are included in the other STIs.

Table 3 shows that between 2023 and 2024 the number of new STI diagnoses in GBMSM has decreased by 8%. The number of new syphilis, genital warts and genital herpes diagnoses have increased while the number of gonorrhoea and chlamydia diagnoses have decreased.

Figure 10. Rate of new STI diagnoses per 100,000 Yorkshire and Humber residents by upper tier local authority of residence, 2024

Data sources: GUMCAD, CTAD

Figure 10 is a bar chart showing that the regional rate of new STI diagnoses for Yorkshire and Humber is 505 per 100,000. This is lower than the England rate of 631 per 100,000. Leeds and North East Lincolnshire have a higher rate than both the Yorkshire and Humber and England rates (692 and 644 per 100,000 respectively). Note that in the 2023 STI Spotlight report for Yorkshire and Humber, data from Leeds was suppressed due to a reporting issue that has since been resolved.

Figure 11. Rate of new STI diagnoses (excluding chlamydia diagnoses in residents aged under 25 years [note 5]) per 100,000 Yorkshire and Humber residents by upper tier local authority of residence, 2024

Data sources: GUMCAD, CTAD

Note 5: Chlamydia diagnoses in the target group of the National Chlamydia Screening Programme NCSP (those aged 15 to 24 years) are excluded because these diagnoses could reflect how NCSP is implemented locally rather than actual prevalence.

Figure 11 is a bar chart showing that, excluding chlamydia diagnoses in residents under 25 years of age, the regional rate of new STI diagnoses for Yorkshire and Humber is 343 per 100,000 population. This is lower than the England rate of 482 per 100,000. Within Yorkshire and Humber, City of Kingston upon Hull has the highest rate (445 per 100,000). Note that in the 2023 STI Spotlight report for Yorkshire and Humber, data from Leeds was suppressed due to a reporting issue that has since been resolved.

Figure 12. Chlamydia detection rate per 100,000 female Yorkshire and Humber residents aged 15 to 24 years by upper tier local authority of residence, 2024

Data sources: GUMCAD, CTAD

Figure 12 is a bar chart showing that the chlamydia rate per 100,000 population in female residents aged between 15 and 24, is highest in North East Lincolnshire, followed by Rotherham and Leeds (2,945, 2,375 and 2,368 per 100,000 respectively). Note that in the 2023 STI Spotlight report for Yorkshire and Humber, data from Leeds was suppressed due to a reporting issue that has since been resolved.

Figure 13. Rate of gonorrhoea diagnoses per 100,000 Yorkshire and Humber residents by upper tier local authority of residence, 2024

Data sources: GUMCAD

Figure 13 is a bar chart showing that the gonorrhoea rate per 100,000 population is highest in Leeds, followed by Sheffield and City of Kingston upon Hull (115, 104 and 104 per 100,000 respectively). Note that in the 2023 STI Spotlight report for Yorkshire and Humber, data from Leeds was suppressed due to a reporting issue that has since been resolved.

Figure 14. Map of new STI rates per 100,000 Yorkshire and Humber residents by upper tier local authority, 2024

Data sources: GUMCAD, CTAD

Figure 14 is map showing the rate of new STIs per 100,000 population is highest in Leeds (692 per 100,000). Note that in the 2023 STI Spotlight report for Yorkshire and Humber, data from Leeds was suppressed due to a reporting issue that has since been resolved.

Figure 15. STI testing rate (excluding chlamydia in under 25 year olds[note 6]) per 100,000 Yorkshire and Humber resident, 2012 to 2024

Data sources: GUMCAD, CTAD

Note 6: Chlamydia diagnoses in the target group of the National Chlamydia Screening Programme NCSP (those aged 15 to 24 years) are excluded because these diagnoses could reflect how NCSP is implemented locally rather than actual prevalence.

Figure 15 is line graph showing that the rate of STI testing per 100,000 population, excluding chlamydia in under 25 year olds, has increased similarly in England and Yorkshire and Humber between 2012 and 2024. Both show a decline in 2020 due to the COVID-19 pandemic.

Figure 16. STI testing positivity rate (excluding chlamydia in under 25 year olds [note 7]) in Yorkshire and Humber residents, 2012 to 2024

Data sources: GUMCAD, CTAD

Note 7: Chlamydia diagnoses in the target group of the National Chlamydia Screening Programme NCSP (those aged 15 to 24 years) are excluded because these diagnoses could reflect how NCSP is implemented locally rather than actual prevalence.

Figure 16 is line graph showing that STI positivity, excluding chlamydia in under 25 year olds, has increased similarly in England and Yorkshire and Humber between 2012 and 2024. Both show a decline in 2020 and 2021 due to the COVID-19 pandemic.

Table 4. Number of diagnoses of new STIs by UKHSA region of residence, data source and data subset 2024

Data sources: GUMCAD, CTAD

UKHSA region of residence	GUMCAD Specialist SHSs	GUMCAD Non-specialist SHSs [note 9]	CTAD [note 8]	Total
East Midlands	13,865	5,900	4,244	24,009
East of England	17,674	2,317	6,551	26,542
London	87,381	11,044	23,995	122,420
North East	10,121	1,722	3,004	14,847
North West	33,672	4,248	9,175	47,095
South East	29,777	2,455	8,472	40,704
South West	17,434	2,856	4,797	25,087
West Midlands	19,125	4,566	3,618	27,309
Yorkshire and Humber	20,263	1,671	6,339	28,273
UK (not England or Wales)			3	3

Note 8: Including site type 12 chlamydia from GUMCAD.

Note 9: Diagnoses from enhanced GPs reporting to GUMCAD are included in the ‘Non-specialist sexual health services (SHSs)’ total.

Table 4 shows that London reported the largest number of new STI diagnoses (122,420), followed by the North West and South East (47,095 and 40,704 respectively).

Table 5. Number of diagnoses of the 5 main STIs in Yorkshire and Humber by STI, data source and data subset 2024

Data sources: GUMCAD, CTAD

5 main STIs	GUMCAD Specialist SHSs	GUMCAD Non-specialist SHSs [note 11]	CTAD [note 10]	Total
Chlamydia	8,075	766	6,339	15,180
Genital Herpes	2,253	8		2,261
Genital Warts	2,046	16		2,062
Gonorrhoea	3,539	869		4,408
Syphilis	494	0		494

Note 10: Including site type 12 chlamydia from GUMCAD.

Note 11: Diagnoses from enhanced GPs reporting to GUMCAD are included in the ‘Non-specialist sexual health services (SHSs)’ total.

Table 5 shows that all syphilis diagnosis were made by specialist SHS as were the majority of all other STI diagnoses. Chlamydia and gonorrhoea diagnoses were the most common STI diagnoses made in non-specialist SHS.

Figure 17. Consultations by service medium: Yorkshire and Humber residents, 2020 to 2024

Data sources: GUMCAD

Figure 17 is a bar chart which shows the changes in number and method of STI consultations between 2020 and 2024. Overall, the number of consultations has increased in this 5 year period, though this may be due to the COVID-19 pandemic impacting services in 2020. Between 2023 and 2024 the number of consultations has decreased with the largest decrease, of 16%, in telephone consultations.

Information on data sources

Find more information on local sexual health data sources in the UKHSA guide.

The gender and age group chart is restricted to those aged 15 to 64 years as information about STIs in those aged under 15 years is considered highly sensitive. Analyses specific to this group are not provided in routine outputs. Rates for those aged 65 or older are withheld to ensure that no deductive disclosure is possible for the under 15 years age group. The proportion of STIs in those aged under 15 years or older than 64 years is very low.

GUMCAD surveillance system

This disaggregate reporting system collects information about attendances and diagnoses at specialist (Level 3) and non-specialist (Level 2) sexual health services. Information about the patient’s area of residence is collected along with demographic data and other variables. GUMCAD superseded the earlier KC60 system and can provide data from 2009 onwards. GUMCAD is the main source of data for this report.

Due to limits on how much personally identifiable information sexual health clinics are able to share, it is not possible to deduplicate between different clinics. There is a possibility that some patients may be counted more than once if they are diagnosed with the same infection (for infection specific analyses) or a new STI of any type (for new STI analyses) at different clinics during the same calendar year.

CTAD surveillance system

CTAD collects data on all NHS and local authority or NHS-commissioned chlamydia testing carried out in England. CTAD is comprised of all chlamydia (NAATs) tests for all ages (with the exception of conjunctival samples), from all venues and for all reasons. CTAD enables unified, comprehensive reporting of all chlamydia data, to effectively monitor the impact of the NCSP through estimation of the coverage of population screening, proportion of all tests that are positive and detection rates.

For services which report to GUMCAD and for which CTAD does not receive data on the patient’s area of residence (for example, SHSs), information about chlamydia diagnoses is sourced from GUMCAD data.

CTAD does not collect information about sexual orientation or country of birth. Reports from CTAD are excluded from figures in this report which relate to analyses by sexual orientation or world region of birth.

New STIs

New STI diagnoses comprise diagnoses of the following:

• chancroid
• LGV
• donovanosis
• chlamydia
• gonorrhoea
• genital herpes (first episode)
• HIV (acute and AIDS defining)
• Molluscum contagiosum
• non-specific genital infection (NSGI)
• non-specific pelvic inflammatory disease (PID) and epididymitis
• chlamydial PID and epididymitis (presented in chlamydia total)
• gonococcal PID and epididymitis (presented in gonorrhoea total)
• scabies
• pediculosis pubis
• syphilis (primary, secondary and early latent)
• trichomoniasis and genital warts (first episode)
• Mycoplasma genitalium
• shigella

Calculations

Confidence Intervals were calculated using Byar’s method for numerators >= 10. For small numerators Byar’s method is less accurate and so an exact method based on the Poisson distribution is used.

ONS mid-year population estimates for 2023 were used as a denominator for rates (other than by ethnic group) for 2024. ONS estimates of population by ethnic group for the year 2019 were used as a denominator for rates by ethnic group for 2024. This is the first time that new estimates of population by ethnic group have been available since 2011. This must be considered if comparing rates for 2024 in this report with rates by 2023 in last year’s report, as the rates in the last report used the 2011 estimates.

Further information

As of 2020, all analyses for this report include data from non-specialist (Level 2) SHSs and enhanced GP services as well as specialist (Level 3) SHSs.

For further information, access the online Sexual and Reproductive Health Profiles.

For more information on HIV data, see the separate HIV Spotlight report.

For more information on local sexual health data sources, see the UKHSA guide.

Local authorities have access to The Summary Profile of Local Authority Sexual Health (SPLASH) Reports (accessible from the Sexual and Reproductive Health Profiles) and the SPLASH supplement reports via the HIV and STI Data exchange.

About the Field Services

The Field Services was established in 2018 as a national service comprising geographically dispersed multi-disciplinary teams integrating expertise in Field Epidemiology, Real-time Syndromic Surveillance and Public Health Microbiology to strengthen the surveillance, intelligence and response functions of UKHSA.

You can contact your local FS team at YHFS@ukhsa.gov.uk.

Acknowledgements

We would like to thank the following:

• local SHSs for supplying the SHS data
• local laboratories for supplying the CTAD data
• UKHSA Blood Safety, Hepatitis, Sexually Transmitted Infections (STI) and HIV Division for collection, analysis and distribution of data

References

1. Office for Health Improvement and Disparities. ‘Chlamydia: proportion of females aged 15 to 24 screened’ Public Health Profiles (viewed on 15 October 2025)
2. UKHSA. Sexually transmitted infections and screening for chlamydia in England: 2024 report (viewed on 27 November 2025)