Your gas experts in South London
Gas Safe compliance, maintenance, repairs, and installations for homeowners and lettings south of the river.
Trusted by the UK's largest operators
About Flame On
Keeping South London warm and compliant for 15+ years. We're Gas Safe registered, ACS certified, and always upfront about what your home or letting needs.
Upfront pricing on every job
No call-out fee, no upselling. Certificates and servicing at a fixed price, everything else by the hour — with a written estimate before any work starts.
Engineer: Flame On Gas & Heating
Licence No: GS/567663
South London & Surrey
14 Victoria Road
Croydon, CR0 1AA
Tel: 020 8243 4829
| # | Location | Type | Manufacturer / Model | Type of flue |
|---|---|---|---|---|
| 1 | Kitchen | Boiler (combi) | Worcester Bosch 30i | Room sealed |
| # | Burner pressure (mbar) | Safety device(s) | Ventilation satisfactory | Flue & termination | Combustion reading | SAFE TO USE |
|---|---|---|---|---|---|---|
| 1 | 12.5 | ✓ | ✓ | ✓ | 8.9% | ✓ |
Gas Safety Certificate (CP12)
Legally required annually. Issued same day, compliance tracked across your portfolio.
from £85
Boiler + One Appliance
Boiler Service
Full annual service: combustion analysis, heat exchanger inspection, flue integrity test, and safety checks to manufacturer specification.
£85
Fixed, Annual
Boiler Repair
Fault diagnosis and repair, charged at £85/hr in-hours with a one-hour minimum. The first hour covers attendance and diagnosis, and counts toward the repair total if you proceed. Parts sourced and supplied. Written breakdown before any further work proceeds.
£85
In-Hours Diagnostic
Gas Hob Installation
Includes tightness testing, appliance commissioning, and sign-off documentation as standard.
from £170
Starting Price
Gas Safety Certificate (CP12) & Boiler Service
Annual service and Gas Safety Certificate (CP12) in a single visit. One appointment, full compliance. Saves £20 versus booking separately.
£150
One Visit
Full price list and payment terms on our rates page. No VAT applied to any price.
Registered and Qualified
“We'll tell you when something isn't worth fixing, but we'll do everything possible to save you money.”
Flame On Gas & Heating
Built on precision and transparency
Fifteen years installing and servicing gas systems across South London. 26,000 jobs completed. Same-day Gas Safety Certificates (CP12). Zero hidden charges, ever.
Years in gas engineering
15+
Installed and serviced across South London
Jobs completed
26,000+
Properties serviced for homeowners and landlords
No hidden charges, ever
£0
A written estimate before we start. Every charge itemised on the invoice.
Done properly, or not at all
Every job is finished to the same standard whether it's an £85 service or a full installation. Pipework is run clean, fixings are tight, and nothing is left in a state we wouldn't be proud to show a customer. That's more than just a policy — it's in our DNA.
What our customers say
From emergency call-outs to routine annual services, trusted by homeowners, landlords, and letting agents across South London.
“Our boiler died on a Sunday evening in January, of all the timing. Answered within the hour, engineer with us by 10am Monday. The part it needed wasn't a common one and being an older boiler it took a couple of days to track down, but they kept me posted the whole time and came back to fit it as soon as it arrived. Patient, honest, first rate.”
“Booked a gas safety check on short notice before a tenant moved in. On time, took about 45 minutes, certificate through by the afternoon. Exactly what you want.”
“I'd been putting off getting the boiler serviced for a couple of years — bad habit. The engineer didn't make me feel judged about it, just got on with the job, flagged a couple of things worth watching, and sent a reminder date for next year. Genuinely good experience.”
“I manage rental flats across Bromley and Lewisham and the annual landlord gas certificates used to be a yearly scramble. Switched over and honestly it's effortless now. They chase the renewal, deal with the tenants, certificates land same day. Wish I'd done it sooner.”
“Fast, polite, did exactly what they said they would and tested everything before leaving. Would use again without hesitation.”
“A carbon monoxide alarm went off and I had no idea whether to ring the gas board or a private engineer. They talked me through what to do straight away, came out the same day, found a fault with the flue and sorted it. So glad I called when I did.”
“Service and gas safety certificate in one visit. Saved time and money. Certificate came through digitally within a couple of hours. Straightforward.”
“Third year using Flame On for our annual boiler service. Consistent, reliable, never any surprises on the invoice. The engineer remembered details from the previous visit and flagged something that had got slightly worse since last time. Solid outfit.”
“I have a flat in Sutton and they handled everything directly with my tenant, then sent me the gas safety certificate without me having to chase a single time. Makes staying compliant easy.”
“We manage around forty properties across Croydon and Bromley and have used Flame On for CP12 renewals across the portfolio for the past eighteen months. Turnaround is reliable, the engineers communicate clearly with tenants, and documentation is always accurate. They understand what a letting agent actually needs.”
We service 11 South London boroughs
Based in Croydon. Select a borough to see key areas, or call if you're unsure — we'll tell you directly.
Three steps, no surprises
Call us or book online
Explain what you need. We'll give you a written estimate before any work starts — no vague figures, no call-out fees, no pressure.
We arrive at the agreed time
You receive a confirmed time slot. If anything changes we call ahead. Punctuality is a professional obligation, not an aspiration.
Documentation issued before we leave
All certificates, inspection records, and Gas Safe paperwork completed and issued on the day. Nothing to chase, no delays.
What your safety check result means
Every gas appliance inspection results in one of three formal outcomes. See the FAQs below for guidance on next steps in each case.
Satisfactory
The appliance meets all current safety standards and is safe to operate. Your Gas Safety Certificate (CP12) is issued on the day. Schedule your next annual check to maintain compliance.
At Risk (AR)
The appliance falls short of current standards but poses no immediate threat to life. Continued use is at the responsible person's discretion while remedial work is arranged promptly.
- Ventilation below recommended levels
- Minor flue joint deterioration
- Overdue servicing or worn seals
- Damaged flame supervision device
Immediately Dangerous (ID)
The appliance poses an immediate risk to life. The engineer disconnects and isolates it on the spot. Reconnection is only permitted after a qualified repair and a fresh safety inspection.
- Active gas leak detected
- Blocked or severed flue
- Dangerously high CO readings
- Flame failure device bypassed
- Critical ventilation deficiency
FAQs
The questions we actually get asked, answered the way they're answered on the phone.
Annually, before winter. An annual service maintains your manufacturer warranty, identifies deteriorating components before they fail, and ensures the appliance meets current safety standards.
A Gas Safety Certificate (CP12) is a Landlord Gas Safety Record — a legal requirement for any rented property with a gas supply. It must be renewed every 12 months and provided to tenants within 28 days of issue. Non-compliance is a criminal offence and may invalidate landlord insurance.
During standard hours (weekdays 8am–6pm) work is charged at £85 per hour with a one-hour minimum; the first hour covers attendance and fault diagnosis. Outside those hours — evenings, weekends and bank holidays — work is charged at £170 per hour, again with a one-hour minimum. If you proceed with the repair, the first hour counts toward the total, so there's no separate call-out charge. Parts are sourced and supplied, and a written cost breakdown is provided before any additional work proceeds.
We aim to attend within 24–48 hours. During cold weather or where vulnerable occupants are involved, we prioritise accordingly. When you call, we'll give you an accurate time frame rather than an optimistic estimate.
Visit gassaferegister.co.uk and enter registration number #567663. It is illegal to work on gas appliances without current Gas Safe registration — we recommend checking any engineer before allowing access to your property.
All major domestic brands: Worcester Bosch, Vaillant, Baxi, Ideal, Glow-worm, Potterton, and Viessmann. For less common models, call us — we'll advise honestly rather than commit to work we're not best placed to carry out.
Your Gas Safety Certificate (CP12) is issued on the day — keep a copy and, if the property is rented, provide one to your tenants within 28 days. We'll be in touch when the next annual inspection is due.
The engineer will leave you with a written notice setting out exactly what was found and why. If you'd like us to carry out the remedial work, we'll provide a written estimate before anything is booked.
Before leaving, the engineer will explain the specific fault clearly and you'll receive a written report the same day. The appliance cannot be used until a Gas Safe engineer has repaired and re-inspected it.
Book a service
Monday to Sunday, 8am – 10pm. A written estimate before any work starts.