Sources
Where our facts come from
Every page lists its sources at the foot. Here they all are, grouped, with what each supports and the date we read it.
Short answer
HSE's guidance for households and landlords, the Gas Safety (Installation and Use) Regulations 1998, GOV.UK's carbon monoxide alarm guidance, Census 2021 via Nomis for Liverpool figures, and GOV.UK and HMRC for funding and VAT.
HSE: domestic gas
- Domestic gas: frequently asked questions · HSE: Gas leak steps and the emergency number, annual servicing advice, CO deaths, cookers, unsafe appliances, emergency heating, reporting via LGSR1. Read 3 November 2026.
- Gas Safe Register and the engineer ID card · HSE: The legal requirement to be on the Gas Safe Register; what the ID card shows. Read 3 November 2026.
- Carbon monoxide poisoning · HSE: Carbon monoxide symptoms and medical advice. Read 3 November 2026.
HSE: landlords
- Landlords’ responsibility for gas safety · HSE: Landlords’ duties overview. Read 3 November 2026.
- Gas safety checks: who needs them · HSE: Who needs annual checks, including lodgers. Read 3 November 2026.
- Gas safety checks: what needs them · HSE: Which appliances and flues need checks. Read 3 November 2026.
- Gas safety checks: who can do them · HSE: Checks only by Gas Safe registered engineers. Read 3 November 2026.
- Gas safety check records and what to keep · HSE: Records: contents, copies within 28 days, two-year retention, the 2018 early window. Read 3 November 2026.
Law and guidance
- Gas Safety (Installation and Use) Regulations 1998, regulation 36 · legislation.gov.uk: The landlords’ duties in the regulations. Read 3 November 2026.
- Smoke and carbon monoxide alarm regulations: Q&A for the private rented sector · GOV.UK: Carbon monoxide and smoke alarms in private rented homes. Read 3 November 2026.
- Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022: guidance · GOV.UK: The 2022 changes, from 1 October 2022, for private and social rented homes. Read 3 November 2026.
- Building regulations approval: when you need it · GOV.UK: Building regulations approval and competent person schemes. Read 3 November 2026.
- DMCC Act 2024, Schedule 20 (banned practices) · legislation.gov.uk: Banned sales practices since April 2025. Read 2 November 2026.
Figures, funding and tax
- Census 2021 TS046, central heating, Liverpool and England · Nomis: Liverpool and England central heating, Census 2021. Read 3 November 2026.
- Census 2021 TS054, tenure, Liverpool and England · Nomis: Liverpool and England tenure, Census 2021. Read 3 November 2026.
- Boiler Upgrade Scheme: what you can get · GOV.UK: Boiler Upgrade Scheme amounts: heat pumps, not gas boilers. Read 3 November 2026.
- VAT Notice 708/6, energy-saving materials and heating equipment · HMRC: Zero rate for installed heat pumps; standard rate for gas boilers. Read 3 November 2026.
- Future Homes and Buildings Standards: consultation response, March 2026 · GOV.UK (PDF): Low-carbon heating in new homes in England from 2027. Read 2 November 2026.
- Find a certified installer · MCS: Finding certified heat pump installers. Read 3 November 2026.
Help and the publisher
- Scams · Citizens Advice: Help with scams and consumer disputes. Read 3 November 2026.
- SEO-DONS LTD (16766013) · Companies House: SEO-DONS LTD’s company record. Read 30 October 2026.
A note on the Gas Safe Register
The Gas Safe Register's own website is where to check an engineer, and we point to it throughout. Its pages couldn't be read by our automated checks, so the facts we give about the register and the ID card come from HSE, which oversees the register's operation. If anything we say about the register differs from its own website, its website is right; please tell us.
A question about gas work in your home?
Tell us what you're trying to sort out. Your message reaches SEO-DONS LTD, the publisher of this guide, and we answer by email. We don't do gas work or recommend engineers, but we can tell you what to check and where. If you smell gas, don't write to us: call 0800 111 999 now.
What happens next
- Your message reaches SEO-DONS LTD, which publishes this guide.
- We reply by email with the rule or check that applies.
- Any work is between you and a Gas Safe registered engineer you choose.