Trusted gas engineers in London
Gas work is tightly regulated: the law requires anyone doing it to be competent, and any business or self-employed engineer doing it to be on the Gas Safe Register. On London Heroes, the Hero Agreement requires current Gas Safe registration for any gas work, and a registration our team has verified shows on the Hero's public Hero Passport.
If you smell gas, or a carbon monoxide alarm sounds: don't smoke, light a flame or touch light switches, open the doors and windows, turn the gas off at the meter if you can reach it safely and it isn't in a cellar or basement, get everyone out, and call the National Gas Emergency Service free on 0800 111 999 before anything else — before calling us.
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What we can help with
- Gas appliance installation, repair and servicing
- Gas safety certificates and landlord CP12s
- Gas hob and cooker installation
- Gas fire inspection and servicing
- Gas pipework and tightness testing
Popular gas services services
Also covered: Gas appliance servicing and repair · Landlord gas safety certificates · Gas fire inspection · Gas pipework alterations · Appliance disconnection and capping— describe the job in your request and we’ll route it correctly.
Recognise the symptom?
The law on gas services
Statutory basis
Gas work in Great Britain is controlled by the Gas Safety (Installation and Use) Regulations 1998 (GSIUR). Regulation 3 states: 'No person shall carry out any work in relation to a gas fitting or gas storage vessel unless he is competent to do so,' and 'No employer shall allow any of his employees to carry out any work in relation to a gas fitting or service pipework and no self-employed person shall carry out any such work, unless the employer or self-employed person, as the case may be, is a member of a class of persons approved for the time being by the Health and Safety Executive for the purposes of this paragraph.' The HSE-approved class is the Gas Safe Register.
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Who may legally do this work
All gas businesses and their engineers must be on the Gas Safe Register to carry out gas work legally in the United Kingdom, Isle of Man, Jersey and Guernsey. Gas Safe Register is the only official gas registration body of gas businesses and engineers in the United Kingdom. It replaced CORGI as the HSE-appointed body in 2009. Engineers are only registered for specific categories of gas work (e.g. boilers, cookers, fires) shown on their Gas Safe ID card, so being registered for one appliance type does not mean an engineer is qualified for all gas work.
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If you own and live in the property
There is no statutory requirement for an owner-occupier to have their own gas appliances serviced or safety-checked on any fixed schedule (unlike landlords). What the law controls is who may do gas work. Regulation 3 of GSIUR states: 'No person shall carry out any work in relation to a gas fitting or gas storage vessel unless he is competent to do so,' and 'no employer shall allow any of his employees to carry out any work in relation to a gas fitting or service pipework and no self-employed person shall carry out any such work, unless the employer or self-employed person, as the case may be, is a member of a class of persons approved for the time being by the Health and Safety Executive' — the Gas Safe Register. So anyone doing gas work in a home must be competent, and a business or self-employed engineer doing it must be Gas Safe registered (regulation 3(4) exempts from the registration rule only replacing a hose or regulator on a portable or mobile space heater, or a hose connecting a refillable cylinder to installation pipework).
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Gas Safe Register can provide a replacement Building Regulations compliance certificate, which is often required when selling a home where gas work (e.g. a new boiler) was carried out — this is a separate document from the annual landlord gas safety check and applies regardless of tenure.
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Regulation 34 of GSIUR says the 'responsible person' for any premises — the occupier, the owner, and anyone with authority to take action on the gas fittings there — 'shall not use a gas appliance or permit a gas appliance to be used if at any time he knows or has reason to suspect that it cannot be used without constituting a danger to any person.'
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HSE's answers to householders' gas safety questions say, on an appliance you suspect is unsafe: 'It is illegal for anyone to use a gas appliance if they suspect it is unsafe. Turn the appliance off and do not touch it until it has been checked by a Gas Safe registered engineer.' On who to use: '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.' And on maintenance: 'HSE strongly advises that all gas appliances, flues and pipework should be installed, regularly maintained and serviced at least annually by a Gas Safe registered engineer.'
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If you’re a landlord
The Gas Safety (Installation and Use) Regulations 1998 (GSIUR) outline your duties as a landlord to make sure all gas appliances, fittings, chimneys and flues are safe and working efficiently. If you're letting a property with gas appliances installed, you've got three main legal responsibilities: (1) gas safety checks, (2) providing the Gas Safety Record to tenants, and (3) maintenance of pipework, appliances, chimneys and flues.
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Regulation 36 of GSIUR requires a landlord to 'ensure that each appliance and flue to which that duty extends is checked for safety within 12 months of being installed and at intervals of not more than 12 months since it was last checked' and to 'ensure that a record in respect of any appliance or flue so checked is made and retained until there have been two further checks of the appliance or flue under this paragraph or, in respect of an appliance or flue that is removed from the premises, for a period of 2 years from the date of the last check of that appliance or flue.' Work must be carried out by 'a member of a class of persons approved for the time being by the Health and Safety Executive' (i.e. Gas Safe registered).
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Records must be 'given to each existing tenant of premises to which the record relates within 28 days of the date of the check' and provided to new tenants before they occupy the premises. Gas Safe Register's own guidance confirms: 'By law, a copy of your Landlord Gas Safety Record should be given to your current tenants within 28 days of the gas safety check - and for new tenants, you'll need to provide this at the start of their tenancy.' For lets under 28 days, a copy must be clearly displayed in the property instead.
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Appliances owned by the tenant are not the landlord's direct responsibility, although the landlord must still ensure the safety of any connecting flues, unless the flue is solely connected to the tenant's own appliance.
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From 1 October 2022, a carbon monoxide alarm is required to be fitted in every habitable room of a rental property containing gas appliances (excluding appliances used for cooking purposes) in England, Scotland and Northern Ireland. The landlord must carry out checks and tests to ensure CO alarms are working on the day any new tenancy begins.
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Your landlord must make sure gas equipment they supply is safely installed and maintained by a Gas Safe registered engineer, have a registered engineer do an annual gas safety check on each appliance and flue, and give you a copy of the gas safety check record before you move in, or within 28 days.
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HSE's guidance on a tenant's heating or hot water being switched off after a gas safety check or maintenance: 'If a gas appliance has been switched off by a Gas Safe registered engineer it is because it is unsafe and should not be used.' And to landlords: 'If a heating appliance has been disconnected then you must provide your tenant with emergency heating, for more information on this contact your local authority whilst arranging for appropriate remedial work by a Gas Safe registered engineer.'
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In England, section 11 of the Landlord and Tenant Act 1985 implies into a lease of a home granted for a term of less than seven years (section 13 of the same Act) a covenant by the landlord 'to keep in repair and proper working order the installations in the dwelling-house for the supply of water, gas and electricity and for sanitation', which covers the gas supply installation but not 'other fixtures, fittings and appliances for making use of the supply of water, gas or electricity'. Installations for heating, such as a gas boiler, are covered separately by section 11(1)(c): 'to keep in repair and proper working order the installations in the dwelling-house for space heating and heating water'. In a flat, it can also reach an installation elsewhere in the building that serves the flat (section 11(1A)). A term in the tenancy putting these repairs on the tenant has no effect, except for repairs the tenant is liable for under their duty to use the home in a tenant-like manner, and for anything the tenant is entitled to remove (section 11(2) and (4)).
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Certificates & records
Landlord Gas Safety Record (LGSR, often called 'CP12' in the industry, though that is not the certificate's legal name)
- Who must hold it:
- Landlords of any property with gas appliances that they supply to tenants
- Frequency:
- Annual — within 12 months of appliance/flue installation and at intervals of not more than 12 months thereafter. Gas Safe Register notes a check can be carried out any time from 10-12 months after the last completed check without affecting the original expiry date; checks done earlier than 10 months or later than 12 months reset the deadline to 12 months from the new check date.
Following the annual gas safety check, the landlord is given a Landlord Gas Safety Record (LGSR) with details of all checks carried out, which must be kept until a further two checks have been carried out and provided to tenants as described above.
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Building Regulations Compliance Certificate for gas work
- Who must hold it:
- Any homeowner or landlord who has had notifiable gas work (e.g. a new boiler) installed
- Frequency:
- One-off, issued after the work; not a recurring certificate
This is a different document from the Gas Safety Record: it confirms new gas work meets Building Regulations, and is often needed when selling a property. Gas Safe Register itself issues replacement copies of this certificate.
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Commonly misunderstood
Can any Gas Safe registered engineer work on any gas appliance?
Registration is appliance/work-category specific — an engineer's Gas Safe ID card lists exactly which types of gas work (e.g. boilers, cookers, gas fires) they are registered for. A consumer should check the ID card or the online register entry covers the specific appliance being worked on, not just that the person is 'Gas Safe registered' in general.
What people often assume instead: Many assume any Gas Safe registered engineer can do any gas job.
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If my tenant refuses access, do I still have to do the gas safety check?
Gas Safe Register's own landlord guidance states that if a tenant refuses access, the landlord 'must show you've taken all "reasonable steps" to comply with the law' — including repeated attempts and written correspondence — and that the regulations 'don't give powers to force disconnection of the gas supply in these circumstances,' so landlords may need legal advice rather than assuming the duty simply lapses.
What people often assume instead: Some landlords believe a tenant refusing access removes the legal obligation to carry out the gas safety check.
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Penalties for non-compliance
HSE guidance to landlords states plainly of non-compliance: 'You are putting lives at risk and breaking the law. HSE gives gas safety a high priority and will take the appropriate action to ensure compliance with the regulations; this could result in a substantial fine and/or a custodial sentence.'
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Breach of the Health and Safety at Work etc Act 1974 (which underpins enforcement of GSIUR) can lead to prosecution under section 33. For an offence under section 33(1)(a) relating to sections 2-6 duties, Schedule 3A sets the maximum penalty on summary conviction (magistrates' court) as imprisonment for a term not exceeding 12 months or a fine not exceeding £20,000, or both; on conviction on indictment (Crown Court) as imprisonment for a term not exceeding two years, or a fine (unlimited), or both. This is the general HSWA penalty structure that gas safety enforcement sits within — the exact penalty class applicable to a specific GSIUR regulation was not independently confirmed against Schedule 3A for every regulation.
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How to check who’s legally allowed to do this
A consumer can find and check a gas engineer by searching postcode or town/city on the Gas Safe Register website, filtering by domestic or commercial fuel type. Every registered engineer carries a Gas Safe ID card showing what gas work they are legally permitted to carry out. Gas Safe Register also investigates reports of illegal gas work and unsafe/unregistered engineers.
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Checked against the sources cited above between and ; each claim shows the date it was checked. Rules and guidance change — always confirm anything material against the official source before acting on it.
How it works
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Tell us what you need
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- 2
We match a verified Hero
We review your request and connect you with a suitable verified professional where available.
- 3
You confirm, your Hero is paid
You pay when you book, and your money is held. Follow the job on its live timeline; when you confirm the work is complete, it is released to your Hero, and you can leave a review tied to the real job.
Pricing, honestly
You approve a price before work starts — either a fixed price for well-defined jobs or a clear quote after assessment. Payment goes through the platform, so what was agreed and what was paid are always on the record.
Areas we cover
London Heroes covers all 33 London boroughs around the clock. Choose yours for the local picture, including what your council requires from landlords.
- Barking and Dagenham
- Barnet
- Bexley
- Brent
- Bromley
- Camden
- City of London
- Croydon
- Ealing
- Enfield
- Greenwich
- Hackney
- Hammersmith and Fulham
- Haringey
- Harrow
- Havering
- Hillingdon
- Hounslow
- Islington
- Kensington and Chelsea
- Kingston upon Thames
- Lambeth
- Lewisham
- Merton
- Newham
- Redbridge
- Richmond upon Thames
- Southwark
- Sutton
- Tower Hamlets
- Waltham Forest
- Wandsworth
- Westminster
Gas services questions, answered
How do I check an engineer is Gas Safe registered?
Can a plumber connect my gas cooker?
What is a gas tightness test?
Related services
Ready when you are
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