Syndromic surveillance summary: 7 June 2026 week 23
Updated 11 June 2026
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Reporting week 23: 1 June to 7 June 2026
During week 23 all syndromic indicators for ‘heat exposure or sunstroke’ returned to seasonally expected levels. GP in-hours allergic rhinitis consultations increased during the reporting week in line with seasonally expected grass pollen activity. Related to this, there were also increases in conjunctivitis and eye problems indicators in children and younger adults. Gastroenteritis indicators (including diarrhoea and vomiting) remained above seasonally expected levels during week 23, but activity was in general stable or decreasing across all systems.
Remote health advice syndromic surveillance system
During week 23, daily NHS 111 triaged calls and online assessments for ‘heat exposure or sunburn’ decreased to expected level. Calls and online assessments for insect bites also decreased and were at seasonally expected levels. Triaged calls and online assessments for diarrhoea and vomiting remained above seasonally expected levels but activity had decreased during week 23. Online assessments for eye problems continued to increase, particularly in the 5 to 14 and 15 to 44 years age groups, with activity remaining above seasonally expected levels.
Note the NHS 111 online vomiting indicator has been reinstated in this bulletin following an investigation of data quality issues with vomiting assessments in the East of England.
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GP in hours syndromic surveillance system
During week 23, GP consultation rates for ‘heat or sunstroke’ and insect bites continued to decrease in line with cooler weather during the reporting week. Allergic rhinitis rates increased in line with expected seasonal grass pollen activity, across all age groups and Midlands and South regions. Related to this, there was also an increase in conjunctivitis consultations in the 5 to 14 and 15 to 44 years age groups. There was an increase in chickenpox in children aged 1 to 14 years, and cellulitis rates continued to increase in adults aged 45 years and over, with activity currently above expected levels.
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GP out-of-hours syndromic surveillance system
During week 23, GP out-of-hours daily contacts for ‘heat or sunstroke’ decreased, returning to seasonally expected levels. Daily contacts for gastroenteritis, diarrhoea and vomiting remained stable, but above seasonally expected levels.
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Emergency department syndromic surveillance system
During week 23 there were further decreases in emergency department (ED) attendances for ‘heat or sunstroke’ with activity returning to seasonally expected levels. Gastroenteritis attendances decreased slightly during the reporting week but remained above baseline. Cardiac conditions and myocardial ischaemia attendances both increased during week 23, but activity had returned to expected levels.
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Ambulance syndromic surveillance system
During week 23, daily ambulance calls for ‘impact of heat or cold’ decreased, returning to seasonally expected levels.