| Burners Ltd, Brighouse, HD6 3PZ |
| Alliance Gas & Plumbing Service, Huddersfield, HD2 1QN |
| Gas Eco Services, , HD2 2JA |
| Checkpoint 2K Ltd, Huddersfield, HD2 1RL |
| Worcester Heating, West yorkshire, WF15 8HQ |
| A.P.S Plumbing, Bradford, BD12 9NH |
| Dean Horsfall Gas Services Ltd, Halifax, HX3 9JS |
| BPH Projects LTD, Cleckheaton, Wf15 8dd |
| Heatbase, Huddersfield, HD2 2SB |
| Neil Collins Gas Engineer, Halifax, HX3 9AL |
| M Jagger, Bradford, BD12 9HL |
| First Call Gas Limited, West yorkshire, BD19 3NX |
| Maude Heating Ltd, , HX1 1PU |
| Terry Broadhead, Mirfield, WF14 0JH |
| G Brogden Gas Services, Huddersfield, HD5 0JU |
| P & R Heating Yorkshire Ltd, Huddersfield, HD3 3EN |
| Domestic Gas Services, , WF15 6AT |
| MPL Plumbing Gas Services, Mirfield, WF14 9SG |
| J J Gas Services, Halifax, Hx1 2xl |
| K D Plumbing & Property Services, Huddersfield, HD3 4DQ |
