| 1. Harwill Plumbing & Heating Contractors | | BR8 7RX Swanley, Kent |
| 2. Bayliss A W Plumbing & Heating Contractors | | TR12 7BP Helston, Cornwall |
| 3. N Smith Plumbing & Heating Contractors Ltd | | LN6 3QX Lincoln, LINCOLNSHIRE |
| 4. Lsc Heating & Plumbing Contractors | | CH45 8LR Wallasey, Merseyside |
| 5. J & R Heating (Contractors) Ltd. | | SN4 7SR Swindon, Wiltshire |
| 6. Wearing John Plumbing & Heating Contractors | | LA12 9NW Ulverston, Cumbria |
| 7. Southgate Heating Contractors | | CM12 9AX Billericay, Essex |
| 8. Phoenix Plumbing & Heating Contractors Ltd. | | G81 1UJ Clydebank, Dunbartonshire |
| 9. R H Heating & Catering Contractors Ltd. | | BT3 9DH Belfast, Belfast |
| 10. Daly Heating Contractors Ltd. | | CV4 8AG Coventry, West Midlands |
| 11. Markland Heating & Building Contractors | | BL1 6DS Bolton, Lancashire |
| 12. Southampton Geothermal Heating Co. Ltd. | | SO14 2EU Southampton, Hampshire |
| 13. H & C Heating | | CW7 3LX Winsford, Cheshire |
| 14. R T B Heating | | NN12 6XP Towcester, Northamptonshire |
| 15. W B D Heating Co. | | KT11 2NA Cobham, Surrey |
| 16. McLeman Heating Ltd. | | BR6 7DH Orpington, Kent |
| 17. L R S Heating | | PO9 5BY Havant, Hampshire |
| 18. Hammon Heating | | NN2 8HD Northampton, Northamptonshire |
| 19. B & W Heating | | OL12 8SW Rochdale, Lancashire |
| 20. Handley Heating Services | | BT32 4HA Banbridge, Co Down |
| 21. M J B Electrical & Heating Services | | BL3 3DA Bolton, Lancashire |
| 22. Thompson Heating | | RM11 2HL Hornchurch, Essex |
| 23. D H Heating | | BH24 3PY Ringwood, Hampshire |
| 24. Swallow Heating & Plumbing | | PE7 3XN Peterborough, Cambridgeshire |
| 25. Brain Heating & Plumbing | | ST16 3TN Stafford, Staffordshire |
| 26. Croft Heating & Plumbing | | OX1 5NH Oxford, Oxfordshire |
| 27. Heating Services | | LA5 0TS Carnforth, Lancashire |
| 28. Able Heating | | TS23 3XN Billingham, DURHAM |
| 29. R M R Heating | | GU10 1HB Farnham, Surrey |
| 30. S W Heating and Plumbing | | TA6 4ET Bridgwater, Somerset |
| 31. Belfast Design Heating | | BT21 0NN Donaghadee, Co Down |
| 32. W B M Plumbing & Heating | | EH9 2NR Edinburgh, Midlothian |
| 33. Hanmer,E R,Heating Contractors | | Wrexham, Clwyd |
| 34. Harewood Heating Co | | LL19 9PS Prestatyn, CLWYD |
| 35. Dove Heating Ltd. | | KT3 3SZ New Malden, Surrey |
| 36. M Wells Heating | | BN3 5AA Hove, East Sussex |
| 37. D C Heating Ltd | | OL1 1HP Oldham, Lancashire |
| 38. R & N Heating | | NE63 0DJ Ashington, Northumberland |
| 39. Edkins Heating | | SG11 1UR Ware, HERTFORDSHIRE |
| 40. Cw Heating Services | | TA4 4NX Taunton, Somerset |
| 41. Hayberry Heating Co | | RH15 9PB Burgess Hill, West Sussex |
| 42. B & B Plumbing & Heating | | BH31 6HG Verwood, Dorset |
| 43. Magna Heating | | OX11 7HX Didcot, OXFORDSHIRE |
| 44. K & J Heating Contractors | | MK16 8DX Newport Pagnell, Buckinghamshire |
| 45. Earlswood Heating Co. Ltd. | | RG18 3BX Newbury, Berkshire |
| 46. R K G Plumbing & Heating | | TQ3 1QU Paignton, Devon |
| 47. B & B Plumbing & Heating | | S81 7LP Worksop, Nottinghamshire |
| 48. K P A Heating | | NR9 3NE Norwich, Norfolk |
| 49. T W Heating Ltd. | | ST5 1BW Newcastle, Staffordshire |
| 50. H2o Heating & Plumbing | | GL19 3AT Gloucester, Gloucestershire |
| 51. Herts Heating | | AL6 0XU Welwyn, Hertfordshire |
| 52. M & N Heating | | OX16 9YL Banbury, Oxfordshire |
| 53. K C Heating & Plumbing | | TN22 1NZ Uckfield, East Sussex |
| 54. K & G Heating | | SK6 2HF Stockport, Cheshire |
| 55. G & W Heating Services | | OX16 8AY Banbury, Oxfordshire |
| 56. D C Heating | | LU2 8RT Luton, Bedfordshire |
| 57. A Garfitt Heating Engineers | | NG4 3RS Nottingham, Nottinghamshire |
| 58. Allison Heating & Plumbing | | NR25 6DH Holt, Norfolk |
| 59. B & B Heating Services | | CA2 5JL Carlisle, Cumbria |
| 60. Clydeway Heating | | ML11 9UP Lanark, Lanarkshire |
| 61. Bettles Heating Ltd. | | WA4 4EE Warrington, Cheshire |
| 62. Highgrove Heating & Plumbing | | RG1 5RD Reading, Berkshire |
| 63. Acorn Heating Services | | DA5 1HX Bexley, Kent |
| 64. Wroughton Heating | | SN4 9HF Swindon, WILTSHIRE |
| 65. Ambassador Heating | | RG30 1AB Reading, Berkshire |
| 66. J R Webster Plumbing & Heating | | CB6 3SE Ely, Cambridgeshire |
| 67. J F White Heating & Plumbing | | GU18 5TB Lightwater, Surrey |
| 68. Two Ways Heating Ltd | | GU22 9JX Woking, SURREY |
| 69. A L Harber Plumbing & Heating | | GL51 0TY Cheltenham, Gloucestershire |
| 70. Fairhaven Heating Ltd. | | TQ2 6AF Torquay, Devon |
| 71. R & B Heating | | CH3 5DB Chester, Cheshire |
| 72. R Hodgkinson Heating | | DE56 2GR Belper, Derbyshire |
| 73. J L F Heating & Plumbing Ltd | | BN3 5FB Hove, East Sussex |
| 74. R & I Plumbing & Heating | | KA8 8DW Ayr, Ayrshire |
| 75. General Boiler Heating Services | | HP19 0FS Aylesbury, Buckinghamshire |
| 76. J B Plumbing & Heating | | NE37 2JZ Washington, Tyne and Wear |
| 77. Giles Heating Services | | HP5 3DD Chesham, Buckinghamshire |
| 78. Vinent Heating & Plumbing | | SG19 1HN Sandy, Bedfordshire |
| 79. Heating & Domestic Services | | GL7 4EA Fairford, Gloucestershire |
| 80. Chamings Plumbing & Heating | | PL19 8AN Tavistock, Devon |
| 81. Plumbing & Heating Services | | PL31 1PR Bodmin, Cornwall |
| 82. Pitts Heating & Plumbing Ltd. | | PE4 6PD Peterborough, Cambridgeshire |
| 83. B & M Plumbing & Heating Services | | BS48 3HX Bristol, Avon |
| 84. Billsons Plumbing & Heating | | LE5 2AG Leicester, Leicestershire |
| 85. Dodsley Heating | | PE26 1JH Huntingdon, Cambridgeshire |
| 86. Lillie Heating Services | | TD7 5AD Selkirk, Selkirkshire |
| 87. C W Heating & Plumbing | | WN3 6AA Wigan, LANCASHIRE |
| 88. Hi-Tec Plumbing & Heating Contractors | | DA8 3PT Erith, Kent |
| 89. Mobore Heating | | RH15 0QP Burgess Hill, West Sussex |
| 90. East Anglia Heating Ltd. | | PE4 6RG Peterborough, Cambridgeshire |
| 91. Morgan Heating | | BR5 2DN Orpington, Kent |
| 92. J F White Heating | | KT4 8HY Worcester Park, SURREY |
| 93. Hardie Heating & Plumbing Engineers | | KT16 9DN Chertsey, Surrey |
| 94. Sansom Heating Ltd | | BA20 2EN Yeovil, Somerset |
| 95. Home Heating | | WS14 9XF Lichfield, Staffordshire |
| 96. Roger Lambert Heating Ltd | | SE19 3RU Upper Norwood, London |
| 97. M B Heating | | NG32 1HW Grantham, Lincolnshire |
| 98. Harrison Heating | | CF81 9EW Bargoed, Mid Glamorgan |
| 99. D M Gale Plumbing & Heating | | TS21 3HH Stockton On Tees, DURHAM |
| 100. Monmouthshire Heating Co. Ltd. | | NP19 0AZ Newport, Gwent |
| 101. Derwentside Heating Services | | DH8 5TD Consett, County Durham |
| 102. Grosvenor Heating Services | | CH1 5AH Chester, Cheshire |
| 103. Addison Plumbing & Heating | | WS13 7NN Derby, Derbyshire |
| 104. Maestro Heating & Electrical | | PO3 6JY Portsmouth, HAMPSHIRE |
| 105. Davern Plumbing & Heating Contractors | | BH3 7JH Bournemouth, Dorset |
| 106. Huxley Heating | | CB4 3NW Cambridge, CAMBRIDGESHIRE |
| 107. Aston Heating Ltd. | | RM1 2PT Romford, Essex |
| 108. J C V Heating & Plumbing | | CF83 3FH Caerphilly, Mid Glamorgan |
| 109. C D I Heating | | WA2 0PJ Warrington, Cheshire |
| 110. Air Heating Ltd. | | G84 8PY Helensburgh, Dunbartonshire |
| 111. H & G Carter Plumbing & Heating | | CH8 9JY Holywell, Clwyd |
| 112. Keith Rogers Plumbing & Heating | | NG19 0QU Mansfield, Nottinghamshire |
| 113. Robertson,M D,Heating & Plumbing Service | | NG17 4BL Sutton-in-Ashfield, Nottinghamshire |
| 114. Swale Heating Ltd. | | ME4 4HP Chatham, Kent |
| 115. Crestbrook Heating Ltd. | | TS24 7AD Hartlepool, Cleveland |
| 116. M & R Heating Services | | KA26 9HH Girvan, Ayrshire |
| 117. Westside Plumbing & Heating | | TA6 7JE Bridgwater, Somerset |
| 118. T D Heating & Pipework Ltd. | | ST6 2NZ Stoke-on-Trent, Staffordshire |
| 119. Derek J Hunter Plumbing & Heating | | DG12 5HS Annan, Dumfriesshire |
| 120. Dalcar Heating Services | | RG45 6SX Crowthorne, Berkshire |
| 121. Ilott Heating | | OX2 0LU Oxford, Oxfordshire |
| 122. D & J Heating & Plumbing | | BS22 8EA Weston-Super-Mare, Avon |
| 123. J N Weatherby Heating Ltd. | | SY3 8JX Shrewsbury, Shropshire |
| 124. A & R Heating & Engineering Services | | DY2 7TH Dudley, West Midlands |
| 125. Fred G Alden (Heating) Ltd | | OX2 6TP Oxford, Oxfordshire |
| 126. Luton Heating Co. | | LU6 2PX Dunstable, Bedfordshire |
| 127. McCormick Plumbing & Heating Engineer | | CV34 5TU Warwick, Warwickshire |
| 128. Regency Heating | | CV34 6QY Warwick, WARWICKSHIRE |
| 129. Dunnes Plumbing & Heating | | BT32 4RT Banbridge, Co Down |
| 130. Privett Heating | | SO23 7AA Winchester, HAMPSHIRE |
| 131. E B Heating Services | | ST14 7LW Uttoxeter, Staffordshire |
| 132. Birmingham Heating Ltd | | B72 1UF Sutton Coldfield, West Midlands |
| 133. Heating & Plumbing Construction | | SM1 3BN Sutton, Surrey |
| 134. Hamilton Brothers (Heating Contractors) Ltd. | | EH22 1AR Dalkeith, Midlothian |
| 135. Townheat Heating & Plumbing | | E11 3AX Wanstead, LONDON |
| 136. Integral Heating | | PO16 8TE Fareham, HAMPSHIRE |
| 137. Forest Heating | | SO41 9LW Lymington, Hampshire |
| 138. A Greenhalgh Plumbing & Heating | | CT3 2AX Canterbury, Kent |
| 139. Derek Austin Heating Ltd. | | IP24 1HE Thetford, Norfolk |
| 140. Brian Healey Heating and Plumbing | | L13 0AP Liverpool, Merseyside |
| 141. S W Hunt (Heating) Ltd. | | CM12 9LT Billericay, Essex |
| 142. Marnall Heating | | BN1 2FA Brighton, East Sussex |
| 143. M D M Plumbing & Heating Services | | ML9 2AU Larkhall, STRATHCLYDE |
| 144. Instant Heating | | SM6 9LB Wallington, SURREY |
| 145. Belmont Heating & Plumbing | | BR4 9BB West Wickham, Kent |
| 146. Fairford Heating | | OX27 7QU Bicester, Oxfordshire |
| 147. J T Heating | | OX16 2AP Banbury, Oxfordshire |
| 148. Hudd Heating & Plumbing | | BS15 3TJ Bristol, Avon |
| 149. Heatwave Heating & Plumbing Engineers Ltd. | | EN5 5HZ Barnet, Hertfordshire |
| 150. Tom Reed Plumbing & Heating | | NE63 0TT Ashington, Northumberland |
| 151. Marchment Heating | | LU2 8EL Luton, BEDFORDSHIRE |
| 152. R & A Plumbing & Heating | | EX8 3HY Exmouth, Devon |
| 153. Pasco Plumbing and Heating | | S81 8JN Worksop, Nottinghamshire |
| 154. C M C Heating | | BH17 8SG Poole, Dorset |
| 155. T.L Allen Plumbing & Heating | | SN8 3TD Marlborough, Wiltshire |
| 156. A R T Plumbing & Heating | | ST5 7TN Newcastle, Staffordshire |
| 157. Excel Heating Services | | B68 9QE Oldbury, West Midlands |
| 158. J D Heating | | BS14 0EN Bristol, SOMERSET |
| 159. Tyneside Heating | | NE40 3AJ Ryton, Tyne and Wear |
| 160. S Crosbie Plumbers & Heating Contractors | | FK15 9HU Dunblane, Perthshire |
| 161. Peron Heating | | RG40 2LG Wokingham, HAMPSHIRE |
| 162. A R Bundy Plumbing & Heating | | SO19 6AZ Southampton, Hampshire |
| 163. Powrmatic Heating & Ventilation | | NG33 4HW Grantham, Lincolnshire |
| 164. Priory Heating & Plumbing Ltd | | NE24 5BU Blyth, Northumberland |
| 165. Angula Heating & Air Conditioning | | E11 3DR Wanstead, LONDON |
| 166. R Burton (Plumbing & Heating) Ltd. | | PE21 8TJ Lincoln, Lincolnshire |
| 167. Roselands Heating Ltd. | | BN22 7RJ Eastbourne, East Sussex |
| 168. F C Smith Plumbing & Heating | | NN7 3JS Northampton, Northamptonshire |
| 169. H & J Plumbing & Heating | | PE29 1SH Huntingdon, Cambridgeshire |
| 170. F Johnson Co. Heating (1983) Ltd. | | CO9 2LS Halstead, Essex |
| 171. G & A Plumbing & Heating Engineers Ltd. | | SG15 6RD Arlesey, Bedfordshire |
| 172. Haven Heating | | PE21 6TF Boston, Lincolnshire |
| 173. J R D Plumbing & Heating | | BN2 9ZD Brighton, East Sussex |
| 174. Howden Plumbing & Heating | | FK8 1NA Stirling, Stirlingshire |
| 175. John Ross Plumbing & Heating | | DE7 6DZ Ilkeston, DERBYSHIRE |
| 176. Thorn Heating Services | | BT23 8GW Newtownards, Co Down |
| 177. P D Plumbing & Heating Services | | ME7 5LW Gillingham, Kent |
| 178. Hightae Heating & Maintenance Services | | DG11 2JZ Lockerbie, DUMFRIESANDGALLOWAY |
| 179. Express Heating Co. Ltd. | | EH3 6NU Edinburgh, Midlothian |
| 180. Watertite Heating Ltd. | | BA12 0BR Warminster, Wiltshire |
| 181. Herts Heating | | CM6 2LG Dunmow, Essex |
| 182. C Curran Plumbing & Heating | | BT22 1AD Newtownards, Co Down |
| 183. Smiths International Plumbing & Heating Ltd. | | DE14 2PL Burton-on-Trent, Staffordshire |
| 184. City Heating Engineers | | CB4 3SA Cambridge, Cambridgeshire |
| 185. Apollo Heating | | ME2 2RG Rochester, Kent |
| 186. Hasland Home Heating | | S44 5AG Chesterfield, DERBYSHIRE |
| 187. Bepton Heating | | GU29 0LR Midhurst, WEST SUSSEX |
| 188. Detonian Heating & Sanitation Co. Ltd. | | BA20 1QG Yeovil, Somerset |
| 189. Heating Services(C G H )Ltd. | | SN1 4DE Swindon, Wiltshire |
| 190. Robin Smith Heating & Plumbing | | IP33 2JZ Bury St Edmunds, Suffolk |
| 191. Rollings Heating Services | | IP33 2QH Bury St Edmunds, Suffolk |
| 192. J T S Plumbing & Heating | | ST7 4RH Stoke On Trent, Staffordshire |
| 193. Anderson (Heating Services) Ltd | | G41 2AN Glasgow, STRATHCLYDE |
| 194. Anderson Heating Services | | G41 2AL Glasgow, STRATHCLYDE |
| 195. Westway Heating (Holdings) Ltd. | | EX15 1JA Cullompton, Devon |
| 196. Falcon Heating Services | | UB4 0RA Hayes, Middlesex |
| 197. Bucon Heating Services Ltd. | | CM6 1HD Dunmow, Essex |
| 198. A G Pyle Plumbing & Heating | | PE13 3QJ Wisbech, Cambridgeshire |
| 199. Basi Heating | | BD3 9LU Bradford, West Yorkshire |
| 200. Glenwood Heating Services | | CV3 2RN Coventry, WEST MIDLANDS |
