TradedocCP12 template
A blank Landlord Gas Safety Record you can print and fill by hand, plus the faster option — generate it on the phone in your van, customer signs from their inbox, done before you pack the tools away. Tracks Gas Safety (Installation and Use) Regs 1998 Reg 36 and IGEM/UP/1B Edition 4 (effective 1 October 2026).
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What it is
A CP12 (properly the Landlord Gas Safety Record, or LGSR) is the document a Gas Safe registered engineer issues after inspecting every gas appliance and flue in a rented property. It proves the landlord has met their annual safety duty. CP12 is the historical CORGI product code, still in everyday use even though CORGI was replaced by Gas Safe in 2009.
UK legal requirement
Required under Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998. Landlord keeps one copy for 2 years, gives a copy to the tenant within 28 days of the check (or before move-in for new tenancies). HSE penalty for non-compliance: unlimited fine and up to 6 months' imprisonment.
Compliance status
This template tracks Gas Safety (Installation and Use) Regulations 1998, Reg 36; IGEM/UP/1B Edition 4 (effective 1 October 2026). Our compliance radar crawls the publishing bodies every six hours — see the standards we build to today or the radar of what's coming next.
Engineer remains responsible for verifying compliance with the version applicable to their work. TradeDoc is a tool, not a regulator.
Who needs it
- ·Every Gas Safe engineer working on rented property
- ·Any engineer servicing gas appliances in HMOs, B&Bs, holiday lets
- ·Engineers working on commercial gas installations (same reg, different form)
What goes on it
Every mandatory field, in the order the inspector or auditor will check them.
Engineer + company details
Gas Safe engineer's full name, their Gas Safe ID number, appliance type the engineer is authorised to work on, company name, company address, Gas Safe registration number.
Property + landlord details
Full property address including postcode, landlord name and address, letting agent details if any, date of inspection.
Appliance details
Every single gas appliance on the premises: make, model, location, type (Type A/B/C for flue classification), owned-by landlord or tenant flag.
Safety checks
Operating pressure reading, gas tightness test result, flue flow test, ventilation adequacy check, combustion performance analyser reading, visual inspection of seals and joints.
Defects + remedial actions
Each defect logged against the specific appliance, action taken (At Risk, Immediately Dangerous, Not to Current Standards), warning notices issued if applicable.
Engineer signature + next inspection date
Engineer signature, date, and the statutory 12-month re-inspection date (required on every CP12, no exceptions).
Common mistakes on a hand-filled one
The small things that get picked up on audit, insurance review, or when the next engineer reads it.
- ✗Missing appliance type (A/B/C) — the flue classification box is the one inspectors most often pick up on review
- ✗No operating pressure reading on a combi — must be recorded in mbar, not just ticked as 'pass'
- ✗Engineer Gas Safe ID number written but not the specific appliance qualification ID — they are different numbers
- ✗Forgetting to issue a warning notice (RIDDOR paperwork may follow) when labelling an appliance as Immediately Dangerous
- ✗Using last year's template and missing the 2022 update to flue classification definitions
- ✗Landlord copy dated but tenant copy missing — both are a legal requirement
- ✗From 1 October 2026: recording the tightness test against meter size rather than Installation Volume — IGEM/UP/1B Edition 4 changed the permissible pressure drop to be IV-based; the old meter-size limits no longer apply
The faster option
Fill one on your phone in 2 minutes
Pick the template. Answer the fields. Customer signs from their inbox. PDF saved in the vault with a unique number. Free forever on your first 100 docs a month. Pro £15/month adds custom branding and one-tap customer email. No card at sign-up.
Frequently asked questions
Is CP12 and Landlord Gas Safety Record the same thing?+
Yes. CP12 is the original CORGI product code. CORGI was replaced by Gas Safe Register in April 2009, but the CP12 label stuck. Every Gas Safe engineer, every letting agent, and every landlord still calls the document a CP12. Officially it is the Landlord Gas Safety Record (LGSR) under Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998.
How long does a CP12 last?+
Exactly 12 months from the date of inspection. Regulation 36(3) requires a fresh check within 12 months of the last one. You can do the next one up to 2 months before expiry without shortening the cycle — the new certificate will carry the same anniversary date as the original.
Does a handwritten CP12 on a blank template count?+
Yes, provided every mandatory field is filled in, it is signed by a Gas Safe registered engineer with the appliance qualification, and both landlord and tenant receive copies within the statutory windows. HSE and Gas Safe both accept handwritten, printed, and digital CP12s as equally valid.
What happens if a landlord doesn't have a valid CP12?+
The landlord commits an offence under Regulation 36. HSE prosecution can result in an unlimited fine and up to 6 months' imprisonment. In England, councils can also serve improvement notices under the Housing Act 2004, and the tenant has grounds for a rent repayment order if the property is licensed.
Can I issue a CP12 if one appliance fails inspection?+
Yes. You still issue the CP12, but you record the defect against that specific appliance and flag it 'At Risk', 'Immediately Dangerous', or 'Not to Current Standards' as appropriate. You also issue the corresponding warning notice and, for ID appliances, disconnect with the customer's permission. The CP12 documents the whole inspection, including what failed.
Do I need a CP12 for commercial gas installations?+
Regulation 36 itself covers rented residential property. Commercial installations are governed by the Health and Safety at Work etc. Act 1974 and the general Gas Safety (Installation and Use) Regulations 1998 — you still record the inspection, but typically on a commercial CP17 or company-specific form. Most Gas Safe engineers use the same structured record format either way.
What changes for tightness testing under IGEM/UP/1B Edition 4?+
From 1 October 2026, IGEM/UP/1B Edition 4 makes Installation Volume (IV) — not meter size — the basis for permissible pressure drop on the tightness test. The new edition also clarifies that any perceptible gauge movement is not attributable to the installation pipework. Use Edition 4's IV calculation table from this date — applying the old meter-size limits invalidates the test record. The standard covers LPG/Air, NG and LPG installations up to 16 m³/h badged capacity and IV ≤ 0.035 m³.