Gas Safe Register
The official register of gas engineers qualified to work safely and legally on gas appliances in the UK. Only Gas Safe registered engineers can carry out the annual gas safety check required for rental properties. Verify an engineer's registration at gassaferegister.co.uk before any work starts.
At a glance
- Who
- Only Gas Safe registered engineers can sign a CP12
- Check
- gassaferegister.co.uk
- Replaced
- CORGI (since April 2009)
Full guide
Read the complete landlord guide on Gas Safe Register
Deadlines, fines and step-by-step compliance in our in-depth resource.
Open full guideWhy Gas Safe Register matters for landlords
The 2009 transition from CORGI to Gas Safe is old news for experienced landlords but still causes false compliance for landlords relying on legacy tradesmen. A handyman uncle doing "the same thing CORGI did" is an unregistered gas operative and the CP12 they produce is legally worthless. Two minutes on gassaferegister.co.uk protects a prosecution defence.
Official sources
LetCompliance editorial reviews this entry every quarter against the sources above. Always confirm specific duties with a qualified solicitor or your local council.
Related terms
CP12 (Gas Safety Record)
The document issued after an annual gas safety check by a Gas Safe registered engineer, commonly called a Gas Safety Certificate. Landlords must renew it every 12 months, give the tenant a copy within 28 days of the check, and give new tenants a copy before they move in. Non-compliance is a criminal offence under the Gas Safety (Installation and Use) Regulations 1998.
CO Alarm (Carbon Monoxide Alarm)
Required from 1 October 2022 in every room with a fixed combustion appliance (excluding gas cookers) in private rented homes in England. The landlord must ensure an alarm is present and in working order at the start of each tenancy. Maximum civil penalty: £5,000 per property.
Compliance Score
A 0-100 score LetCompliance assigns to each property based on how up-to-date its safety certificates and tenancy documents are. 100 means Gas Safety, EICR, EPC, deposit protection and Right to Rent are all current; the score drops as deadlines approach and is recalculated daily.
Ground Rent
A payment due from a leaseholder to the freeholder. Ground rents on long leases granted on or after 30 June 2022 are capped at a peppercorn (effectively zero) under the Leasehold Reform (Ground Rent) Act 2022.
Accelerated Possession
A fast-track court procedure used under a Section 21 notice in England and Wales. Abolished for new claims from 1 May 2026 because Section 21 no longer exists. Possession is now pursued under Section 8 using a specified ground.
AST (Assured Shorthold Tenancy)
The most common form of private tenancy in England. From 1 May 2026 all existing ASTs converted to assured periodic tenancies under the Renters Rights Act 2025, and new fixed-term ASTs can no longer be created for most residential lets.