Unregistered gas engineer pleads guilty to multiple breaches

illegal gas work, gas work,

An investigation by the Health and Safety Executive (HSE) found that Dean Coslett, trading as Dorset Boiler Company, carried out illegal gas work and breached an HSE Prohibition Notice

On 12 September 2018, HSE served Dean Coslett with a Prohibition Notice prohibiting him from undertaking gas work whilst not registered with the Gas Safe Register.

However, he breached this Prohibition Notice by continuing to undertake unregistered gas work.

Bournemouth Crown Court heard how undertook illegal gas work at a number of properties in Dorset between December 2017 and April 2019 whilst he was not registered with the Gas Safe Register.

He used false Gas Safe Register registration numbers on the paperwork he issued and left gas appliances incorrectly installed.


Dean Coslett pleaded guilty to breaching Regulation 3(3) and 3(7) of the Gas Safety (Installation and Use) Regulations 1998 and Section 33(1)(g) of the Health and Safety at Work Act 1974.

He was sentenced to a three-year community supervision order, ordered to undertake 200 hours of unpaid work and undertake 30 days of offender rehabilitation work.

Dean was also ordered to pay £900 compensation to a number of homeowners for the substandard work he undertook at their homes.

HSE inspector, Simon Jones, said: “Anyone employed to work on gas appliances in domestic premises must be a Gas Safe registered engineer and competent in that area of gas work.

“The gas engineer’s competencies are clearly marked on the back of the engineer’s Gas Safe Register ID card. If in any doubt you can contact the Gas Safe Register or check their website to see if the engineer is registered.

“If anyone has had any gas work carried out by Mr Blues, I urge them to ensure that the work is now checked by a registered Gas Safe Register engineer as soon as possible.”


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