By city
London 16Leeds 10Milton Keynes 9Glasgow 9Swindon 8Bradford 8Cardiff 8Warrington 8Edinburgh 8Nottingham 8Birmingham 7Preston 7Cambridge 7Manchester 7Norwich 7Newcastle upon Tyne 7Liverpool 6Stockport 5Reading 5Sheffield 5Hull 5Leicester 5Bedford 5Brighton 5
| Name | Category | Address | City | Opening times |
|---|---|---|---|---|
| Integral Plumbing and heating Ltd | Plumber | 11 Chardacre | Milton Keynes | Daily Open 24 hours |
| IQ Plumbing Services Ltd | Plumber | 255A Queen's Rd | London | Daily Open 24 hours |
| J R Gasworks Plumbing & Heating | Plumber | 14 Piper Cl | Nottingham | Daily Open 24 hours |
| Jd Lane Plumbers & Builders | Central heating service | 65 The Hill | Nottingham | Mon–Fri 08:00–18:00 |
| JDF Maintenance (Huddersfield) Limited | Gas engineer | 43 Crosland Hill Rd | Huddersfield | Mon–Fri 07:30–17:00 |
| JJ Rowney gas & heating engineers | Plumber | Holmefield 32, Station Rd | Doncaster | Mon–Wed 08:00–17:00 |
| JMES Services | HVAC contractor | 6 Grange Bank Cl | Huddersfield | Thu Open 24 hours |
| JRM Plumbing & Gas Ltd | Central heating service | 53 Scholes Ln | Bradford | Mon–Fri 08:00–17:00 |
| JW Heating Services | Central heating service | 7A, The Warehouse Studios, Glaziers Ln | Warrington | Mon–Fri 09:00–17:00 |
| KA Maintenance | Elektroinstallateur | Wilderness Rd | Reading | Daily Open 24 hours |
| KC Plumbing & heating services | Gas engineer | 97 Normanton Rd | Derby | Mon–Sat 09:15–17:00 |
| KDB Gas and Oil Heating services | Oil & natural gas company | Green Acres | Hull | Mon–Fri 09:00–16:00 |
| Krown Construction | Property maintenance | Acorn House, 381 Midsummer Blvd | Milton Keynes | Daily 08:00–20:00 |
| Landlord Safety Certificate | Certification agency | Unit 9, Maybank Industrial Estate, 109 Maybank Rd | London | Fri–Sat 09:00–18:00 |
| LCA Maintenance Services Limited | Plumber | Singer Court | Bedford | Mon–Thu 07:00–20:30 |
| Leefe Plumbing | Plumber | 95 Beech Ave | York | Mon–Fri 08:00–17:30 |
| Let's Heat | HVAC contractor | Connies House, Rhymney River Bridge Rd | Cardiff | Daily Open 24 hours |
| LG Bullen Plumbing & Heating | Gas engineer | Maggie O'Neill Resource Centre, 433 Liverpool Rd | Liverpool | Mon–Sat 08:00–17:00 |
| Llandaff Heating | Plumber | 9 Victoria Ave | Cardiff | Daily Open 24 hours |
| LPS Limited | Central heating service | 20 Otley Rd | Leeds | Mon–Thu 08:00–17:00 |
| M D Govier Electrical Engineering Ltd | Electrical engineer | 21 Beaufort Ct, Roebuck Way | Milton Keynes | Mon Open 24 hours |
| Macbrook gas LTD | Boiler supplier | Unit 8, Bunns Bank, focus business park | Norwich | Mon–Fri 08:30–17:00 |
| Mamoss Gas, Heating And Electrical | Central heating service | Unit C, 279 Bethnal Grn Rd | London | Daily Open 24 hours |
| Marigold Engineers Ltd | Catering supplier | Unit 19 Moorside | Colchester | Mon–Fri 08:00–17:00 |
| Master Plumb | Gas engineer | 42 Totley Brook Rd | Sheffield | Mon–Fri Open 24 hours |
| MDS Heating | Plumber | Rutherford House | Warrington | Daily Open 24 hours |
| Mekkmaster Heating Ltd | Gas engineer | 6 Ferrymans Quay | Southampton | Mon–Fri 08:00–18:00 |
| Midlands 24hr Plumbing | Plumber | 52 Southdale Rd | Nottingham | Daily Open 24 hours |
| Nationwide Boiler Hire | Heating equipment supplier | Unit 4, Blurton Business Park | Stoke-on-Trent | Daily Open 24 hours |
| Nationwide Range Repairs Limited | Gas engineer | 2 Tatchbury Rd | Manchester | Daily Open 24 hours |