Door supervisor and company boss convicted for unlicensed work
A door supervisor who continued to work after his SIA licence expired, and the boss of the company who deployed him, have been convicted of multiple offences.
On 2 September 2025 at Weymouth Magistrates Court, Mark Tilley pleaded guilty to 2 offences under Section 3 of the Private Security Industry Act (PSIA) 2001 and one offence under Section 1 of the Fraud Act 2006. This was due to Mr Tilley continuing to work as a door supervisor illegally at multiple venues around Weymouth when his SIA door supervisor licence expired in June 2024.
At his sentencing on 25 November 2025, Mark Tilley was ordered to pay a fine of £80 per offence, as well as a victim surcharge of £96 and prosecution costs of £164, totalling £500 overall.
Mr Tilley was deployed to those venues by a company called Chesil Security Ltd, of which William Joynes was the sole director. Mr Joynes then admitted in an interview under caution with the SIA to deploying Mr Tilley without checking he had renewed his SIA licence after June 2024.
He also admitted that he had not complied to a request by the SIA officer in the case to provide information and that he had no reasonable excuse. Finally, he admitted to lying in his response by saying that after Mark Tilley’s licence had expired that he was only working as a concierge at one of the venues, rather than a door supervisor.
As a result, William Joynes pleaded guilty to 2 offences under Section 5 and Section 23 of the PSIA, one offence under Section 19 and one offence under Section 22 of the same law. He also appeared on behalf of his former company, Chesil Security Ltd and entered pleas on their behalf for 2 offences contrary to Section 5 of the PSIA.
William Joynes was sentenced later on 26 January 2026 and was given a 12-month community order, which included 50 hours of unpaid work. He was also ordered to pay prosecution costs of £500 and a victim surcharge of £114. His company Chesil Security Ltd was fined £400, as well as ordered to pay prosecution costs of £500 and a victim surcharge of £160.
Nicola Bolton, SIA Criminal Investigations Manager, said:
By knowingly deploying an unlicensed security operative through his company Chesil Security Ltd, William Joynes put the public at risk for his own profit. Equally, Mark Tilley did similar by acting as said unlicensed security guard.
I am glad that this risk was reflected in their sentencing, which includes 50 hours of unpaid work and payments collectively totalling over £2000. This makes clear to anyone in the security industry that seeks to ignore the law, the penalty will be significant.
Background
By law, security operatives working under contract must hold and display a valid SIA licence. Information about SIA enforcement and penalties can be found on GOV.UK/SIA.
The offences relating to the Fraud Act 2006 mentioned above are:
- Section 1 – false representation
The offences relating to the Private Security Industry Act 2001 mentioned above are:
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Section 3 – engaging in licensable conduct without a licence
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Section 5 – supply of unlicensed operatives
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Section 19 – obstructing SIA officials or those with delegated authority, or failing to respond to a request for information
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Section 22 – making a false statement to the SIA
The SIA is the organisation responsible for regulating the private security industry in the UK, reporting to the Home Secretary under the terms of the Private Security Industry Act 2001. The SIA’s main duties are the compulsory licensing of individuals undertaking designated activities and managing the voluntary Approved Contractor Scheme (ACS).
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