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Gas Safe RegisteredValid 12 months

Gas Safety Certificate (CP12)

Name: Certanly
Address: London, GB
Telephone: 020 8145 5369
Price range: ££
Rating: 4.9

Landlords must have every gas appliance, fitting and flue checked once a year. A Gas Safe engineer inspects, tests and issues your certificate the same day.

Same-week appointments across all 32 London boroughs

Digital PDF certificate delivered within 24 hours of pass

Automatic free renewal reminders 11 months before expiry

Book from £60 020 8145 5369

What it is

What is a Gas Safety Certificate?

CP12 stands for Landlord Gas Safety Record. Landlords must have every gas appliance, fitting and flue checked once a year. A Gas Safe engineer inspects, tests and issues your certificate the same day.

The legal requirementGas Safety (Installation and Use) Regulations 1998. Tenants must receive a copy within 28 days of the check.

What’s included

What our engineer tests on the day

Gas tightness test on the installation

Operating pressure and heat input

Flue flow and spillage tests

Ventilation checks

Safety device operation

Carbon monoxide alarm check

The visit

How your inspection works

Arrive

We text 30 minutes before. Your tenant or letting agent can let us in.

Inspect

Every item on the official checklist is tested and logged digitally on a tablet.

Explain

You receive a clear plain-English summary and an on-the-spot quote for any fixes.

Certify

The certificate is validated and emailed to you and anyone you add within 24 hours.

Common issues

Why inspections fail

Poor ventilationBlocked or undersized air vents to the appliance.

Flue problemsFlue not sealed, supported or terminating safely.

Faulty safety devicesFlame failure or overheat cut-out not working.

Gas leaksPressure drop on the tightness test.

If something fails on the day

Your engineer explains the issue in plain English, provides an immediate quote, and can usually fix minor defects in the same visit. You only pay for the certificate once.

What you receive

Your certificate, delivered within 24 hours

CERT · CP12-48213

CP12Gas Safety Certificate

PropertyFlat 4, 18 Romford Rd, E7

Inspected14 Oct 2026

EngineerJ. Harper · Reg. 584213

Next dueValid 12 months

PASSED

Sample digital layout. Official certificates adhere to statutory regulatory standards.

FAQs

Frequently asked questions

12 months. Give a copy to existing tenants within 28 days of the check and to new tenants before they move in.

Often booked together

Add to the same visit and save 15%

Save time and travel costs by bundling compliance checks.

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