- Norrard Electrics
- The Docks, Milford Haven, Dyfed, SA73 3AU
- D J Electrics
- 6 Scurlock Drive, Neyland, Milford Haven, Dyfed, SA73 1PJ
- D & S Electrical Services
- George Street, Milford Haven, Dyfed, SA73 2AY
- D & S Electrical Services
- George Street, Neyland, Milford Haven, Dyfed, SA73 1RR
- Lightning Electrical Construction
- Elf Oil Refinery, Milford Haven, Dyfed, SA73 3JD
- Neyland Marine Services
- The Docks, Milford Haven, SA73 3AF
- Neyland Marine Services Ltd
- The Docks, Milford Haven, Pembrokeshire, SA73 3DJ
- Rite Konnection Electrical Contractors
- Unit 1 Havens Head Bsns Pk, Havens Head, Milford Haven, Dyfed, SA73 3QH
- Switch Electrical
- The Gallery Precinct, 25-27 Charles Street, Milford Haven, Dyfed, SA73 2AA
- J A Electrical Contractors
- Willowbrook Cottage, Rickeston, Milford Haven, SA73 3TH
- Rite Konnection Electrical Contractors Ltd
- Unit 16b Waterston Ind Est, Milford Haven, Pembrokeshire, SA73 1DP