| Ambien Heating Specialists, Gainsborough, DN213AQ |
| Heatech Services Ltd, Gainsborough, DN21 3GB |
| Chris Charman Plumbing & Heating, Doncaster, DN10 4DP |
| Martin Lake, Doncaster, DN21 5PF |
| Robert I Foreman, Doncaster, DN9 1RE |
| P Threadgould Plumbing and Heating Engineer, Donaster, DN9 1AQ |
| S N S Heating & Plumbing, Retford, DN22 6TN |
| A Booth Plumbing Ltd, 34 Grove Street, Retford, Nottinghamshir, DN22 6JR |
| Andrew Lane, Retford, DN22 7YH |
| David Pearce Plumbing and Heating, Epworth, DN9 1DW |
| JKN Renewables Ltd, Doncaster, DN9 1JL |
| Taggas, , DN22 7XT |
| Wren-Gas , RETFORD, DN22 7NU |
| A D R Plumbing, Retford, DN22 7PN |
| Ashby Gas services, , DN17 3LN |
| B.B Plumbing & Heating, Scunthorpe, DN17 2GJ |
| Shaw Bros. Limited, Unit 1, Shrewsbury Road, Bircotes, Donca, DN11 8DE |
| S & B Property Maintenance, Scunthorpe, DN17 2HH |
| A Tye, Doncaster, DN11 8PB |
| Valley Breeze, Newark, NG23 7EW |
