Glossary — Compliance
CP12
The annual Landlord Gas Safety Record — the certificate every UK landlord with gas appliances must hold and renew yearly.
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Definition
CP12 is the annual Landlord Gas Safety Record — the certificate a Gas Safe registered engineer issues after a 12-month gas safety check of every gas appliance, flue, and pipework in a let property in England, Wales, or Scotland.
Required by the Gas Safety (Installation and Use) Regulations 1998 (as of May 2026), the check must be repeated within 12 months of the previous one. A copy must be issued to existing tenants within 28 days and to new tenants before they move in. Landlords must keep the record for at least two years.
In detail
The name “CP12” is informal — derived from the old British Gas form code. The legally accurate name is “Landlord Gas Safety Record” or “Landlord Gas Safety Certificate.” Most engineers, agents, and landlords still call it the CP12.
CP12 applies only to let residential properties with gas appliances. If a property has no gas supply, no certificate is required. The check must be done by a Gas Safe registered engineer — the only legally recognised competence scheme since 2009.
Penalties for failing to hold a current CP12 are significant — unlimited fines and, in cases involving harm, criminal charges under the Health and Safety at Work Act 1974. Tenants can also withhold service charges or pursue rent repayment orders in some jurisdictions.
LandlordFlow is not an HMRC-recognised MTD filing tool; it is operational software that stores CP12 records by property, alerts you 30 days before expiry, and exports a clean audit trail when an inspector or insurer asks.
See LandlordFlow handle CP12 in practice
25-minute walk-through of how LandlordFlow tracks compliance certificates, financial records, and the MTD readiness layer.