- 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
- 0845 3736639 - 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
- 0870 8148358 - Unit 16a Howard Wks Norwich Rd, Halesworth, Suffolk, IP19 8QJ
- Jem Gas Services
- 01284 704520 - 28 Oaks Road Bury St Edmunds, Bury St Edmunds, IP32 6PW
- 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
- Jefford & Partners
- 01986 872063 - 19 Mill Hill Drive,, Halesworth, Suffolk, IP19 8DB