- A & M Gas Services
- 01553 829405 - 10 Chapel Road, Terrington St. Clement, King's Lynn, Norfolk, PE34 4NB
- Jim Coulson
- 01842 763069 - 100 Redgate, Thetford, Norfolk, IP24 2HB
- Gas Wise Services
- 01553 769404 - Horsleys Flds, King's Lynn, Norfolk, PE30 5DD
- Anglia Boiler Maintenance
- 01493 721373 - 70a High St, Great Yarmouth, NR30 5XA
- Continental Product Engineering
- 01508 528060 - Little Money Road, Loddon, Norwich, Norfolk, NR14 6JD
- Norfolk Gas Services Ltd
- 01692 409008 - Unit 10, Douglas Bader Close, North Walsham, Norfolk, NR28 0TZ
- Gasman-Service
- 01953 852385 - 1 Low Street, Hardingham, Norwich, Norfolk, NR9 4EL
- Nashgas
- 01379 644012 - Cobbs Yd St. Nicholas St, Diss, Norfolk, IP22 4AL
- Tonesystem
- 20 Windsor Chase, Taverham, Norwich, Norfolk, NR8 6LW
- PM Services Anglia Ltd
- 01493 300476 - 10 Gaywood Close, Great Yarmouth, Great Yarmouth, NR30 5RD
- Gasway Services Limited
- 01603 404755 - 13 Barrow Close Sweet Briar Ind Est, Sweet Briar Road Industrial Estate, Norwich, Norfolk, NR3 2AT
- Bribeck Plumbing and Heating
- 0845 4917036 - 35 Cricks Road West Row, Bury St Edmunds, Suffolk
- T W Boiler Services
- 0845 1367586 - 33 Willow Way Martham, Great Yarmouth, Norfolk, NR29 4SB