| Baineport Engineering Services Ltd | 0870 241 4806 | | Unit 4 The Dock, Ely, CB7 4GS |  Map & Directions |
| Holgate & French Shelford Ltd | 01353 668811 | | 71a Newnham Street, Ely, CB7 4PQ | | Map & Directions |
| Henderson Electrical Services Ltd | 01353 722773 | | Unit 8 Orchard Farm Business Park, Barcham Road, Soham, Ely, CB7 5TU | | Map & Directions |
| Graham Barber Electrical Services Ltd | 01353 666831 | | Unit 12, The Dock, Ely, CB7 4GS | | Map & Directions |
| Principia Electronic Manufacturing Ltd | 01223 872870 | | Button End, Harston, Cambridge, CB2 5NX | | Map & Directions |
| North Essex Electric | 01223 834266 | | 8 Green Street, Duxford, Cambridge, CB2 4RG | | Map & Directions |
| Firm Line | 01223 830380 | | 163 High Street, Sawston, Cambridge, CB2 4HN | | Map & Directions |
| Isaacson Electrical | 01223 813735 | | 6 Millards Lane, Lode, Cambridge, CB5 9ES | | Map & Directions |
| T W Electrical | 01353 862900 | | 12 Kingsmead Court, Littleport, Ely, CB6 1LR | | Map & Directions |
| Ultra Electronics Ltd | 020 8813 4444 | | Vitrum Building, Cowley Road, St. Johns Innovation Park, Cambridge, CB4 0WS | | Map & Directions |
| Barnwell Electrical Co Ltd | 01223 240967 | | 9 Ronald Rolph Court, Wadloes Road, Cambridge, CB5 8PX | | Map & Directions |
| The Power Service | 01954 715064 | | 30 Monkfield Lane, Great Cambourne, Cambridge, CB3 6AJ | | Map & Directions |
| Cartwright Bros | 01638 662436 | | 40 High Street , Newmarket, CB8 8LB | | Map & Directions |
| James Lee Electrical Ltd | 01353 860310 | | 48 Station Road, Littleport, Ely, CB6 1QF | | Map & Directions |
| Redpost Electronic Products Ltd | 01954 718001 | | The Old Pumping Station, Toft Road, Bourn, Cambridge, CB3 7TT | | Map & Directions |
| Product Technology Partners Ltd | 01954 212806 | | 147 St. Neots Road, Hardwick, Cambridge, CB3 7QJ | | Map & Directions |
| T S Electrical Services | 01223 516767 | | 12 Leys Road, Cambridge, CB4 2AT | | Map & Directions |
| David Holgate | 01223 842040 | | 80 Birch Trees Road, Great Shelford, Cambridge, CB2 5AW | | Map & Directions |
| J G Kidman | 01799 500416 | | 23 Hollyhock Road, Saffron Walden, CB10 2AG | | Map & Directions |
| C B Bavester & Son | 01223 860589 | | 25 Bannold Road, Waterbeach, Cambridge, CB5 9LQ | | Map & Directions |
| P Meeks Electrical Ltd | 01223 893173 | | 84 High Street, Linton, Cambridge, CB1 6JT | | Map & Directions |
| Mann Electrical | 01223 441111 | | The Old School, High Street, Horningsea, Cambridge, CB5 9JG | | Map & Directions |
| Harwood Electrical | 01353 778694 | | 15 The Slade, Witcham, Ely, CB6 2LA | | Map & Directions |
| Progressive Assemblies | 01954 230071 | | 7a Norman Way, Norman Way Industrial Estate, Over, Cambridge, CB4 5QE | | Map & Directions |
| Temporary Electrical Specialists & Testing | 01440 762905 | | 10 Helions Park Gardens, Haverhill, CB9 8BW | | Map & Directions |
| Quest Services | 01223 415440 | | 84 Ditton Fields, Cambridge, CB5 8QL | | Map & Directions |
| Safe-Tec Electrical Services | 01223 213154 | | 19 Shepherds Close, Cambridge, CB1 9HP | | Map & Directions |
| Gilson R A | 01353 860933 | | 4 Barkhams Lane, Littleport, Ely, CB6 1NN | | Map & Directions |
| Matthews Electrical | 01223 352128 | | 62 Alex Wood Road, Cambridge, CB4 2EH | | Map & Directions |
| H E Manley & Son | 01799 520331 | | Southgate House, Thaxted Road, Saffron Walden, CB10 2UR | | Map & Directions |
| Dan Everard Partnership | 01223 844280 | | 172 Cambridge Road, Great Shelford, Cambridge, CB2 5JU | | Map & Directions |
| Euro Electrical Services Ltd | 01799 524991 | | 24 Rylstone Way, Saffron Walden, CB11 3BS | | Map & Directions |
| Micro Lab Informatics | 01440 706609 | | 4 Homefield Road, Haverhill, CB9 8QP | | Map & Directions |
| Rep Installations Ltd | 01799 540011 | | 10 Station Road, The Maltings, Newport, Saffron Walden, CB11 3RN | | Map & Directions |
| Playford & Son Ltd | 01638 663444 | | 5 Craven Way, Newmarket, CB8 0BW | | Map & Directions |
| Wilectronic Ltd | 01223 836088 | | 4 Cambridge Road, Babraham, Cambridge, CB2 4AF | | Map & Directions |
| Aatec Services Ltd | 01638 669952 | | 35 Barry Lynham Drive, Newmarket, CB8 8YU | | Map & Directions |
| Sorrell Electrical | 01223 834964 | | 8a Common Lane, Sawston, Cambridge, CB2 4HW | | Map & Directions |
| C J Neaves | 01223 872276 | | 61 London Road, Harston, Cambridge, CB2 5QJ | | Map & Directions |
| U R Electric Services | 01223 248326 | | 167 Coleridge Road, Cambridge, CB1 3PN | | Map & Directions |
| Thompson Electrical Ltd | 01223 212162 | | 15 Barnwell Drive, Barnwell Business Park, Cambridge, CB5 8UZ | | Map & Directions |
| M G Griffin | 01799 540587 | | Rowney House, Thaxted Road, Debden, Saffron Walden, CB11 3LW | | Map & Directions |
| Farrant Electrical Ltd | 01440 703497 | | Unit 1, Homefield Road, Haverhill, CB9 8QP | | Map & Directions |
| Pathway Systems | 01954 267166 | | Mulberry House, 46 Boxworth Road, Elsworth, Cambridge, CB3 8JQ | | Map & Directions |
| Elex Electrical Contractors | 01440 702069 | | Wratting Croft, Haverhill Road, Little Wratting, Haverhill, CB9 7UD | | Map & Directions |
| Brian Langley & Son Ltd | 01223 860720 | | 28 Station Road, Waterbeach, Cambridge, CB5 9HT | | Map & Directions |
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