- Gas Tek Ltd
- 01284 723757 - 1c Boldero Road, Bury St. Edmunds, Suffolk, IP32 7BS
- Willowserve Ltd.
- 0845 8393175 - 16 Grove Park Walsham-le-Willows, BURY ST. EDMUNDS, IP31 3AE
- Blue Flame Gas Services
- 01473 231500 - Ipswich, Suffolk, IP1 2AU
- Mick Boulter
- 01787 460610 - 3 Warburton Avenue, Sible Hedingham, Halstead, Essex, CO9 3JX
- Quentin Garlick
- 01728 602980 - P O Box 19, Saxmundham, IP17 1II
- Hardwick Gas Services
- 01473 713721 - 27 Hardwick Close, Rushmere St. Andrew, Ipswich, Suffolk, IP4 5XB
- Eastern Gas Services
- 01986 872161 - Unit 16a Howard Wks Norwich Rd, Halesworth, Suffolk, IP19 8QJ
- East Anglia Gas Services
- 01502 581926 - 20 Blackheath Road, Lowestoft, Suffolk, NR33 7JG
- Gammax Independent Inspection Services (depden)
- 01284 850808 - Suffolk, Suffolk, IP29 4BY
- Anglo Gas & Heating Services
- 01440 785034 - The Street, Ashen, Sudbury, Suffolk, CO10 8JN
- League of Gas Engineers
- 01473 250182 - 8 Anita Close West Ipswich, Suffolk, IP2 0JJ
- Gas Fired Products UK Ltd
- 01473 830551 - Claydon, Ipswich, Suffolk, IP6 0JL
- Intelligent Heating
- 0800 5877542 - 23 Holywells Rd, Ipswich, Suffolk, IP3 0DL
- Fix It Plumbing and Heating
- 01473 636174 - 43 Edmonton Close Kesgrave, Ipswich, IP5 1HF
- Jefford & Partners
- 01986 872063 - 19 Mill Hill Drive,, Halesworth, Suffolk, IP19 8DB
- Roundhouse Services
- 01473 829741 - Samsons Lodge Cottage Whatfield Road, Ipswich, IP7 6LJ
- Crown Plumbing and Heating
- 01473 785428 - Greenway Hall Lane, Ipswich, IP6 9HN
- AHD Heating and Plumbing
- 07717 666116 - Bury St Edmunds