| Internal Tv Contracts | 01708 725511 | | Unit 4, Brooklands Approach, Romford, RM1 1DX |  Map & Directions |
| Stirling Ice | 01708 450477 | | 104 North Street, Hornchurch, RM11 1SU | | Map & Directions |
| Metro Security | 0870 609 0095 | | 5 Ashton Road, Harold Hill, Romford, RM3 8UJ | | Map & Directions |
| Icol Security Systems | 0800 043 0835 | | 12 Meadowside Road, Upminster, RM14 3YT | | Map & Directions |
| Guardian Gsf Ltd | 01708 348755 | | Spilsby Road, Harold Hill, Romford, RM3 8SB | | Map & Directions |
| J Durrance & Co Ltd | 01708 258999 | | Durrance House, 855 London Road, Grays, RM20 3LG | | Map & Directions |
| City Alarms | 01708 437000 | | 137 Hornchurch Road, Hornchurch, RM12 4TB | | Map & Directions |
| Security Door Systems Ltd | 01708 891711 | | Unit 2, Thurrock Commercial Centre, Purfleet Industrial Park , Aveley, South Ockendon, RM15 4YA | | Map & Directions |
| Act Security Systems Uk Ltd | 020 8598 2555 | | 677 Green Lane, Dagenham, RM8 1UU | | Map & Directions |
| Central Security Ltd | 020 8270 9442 | | 19 Station Road, Chadwell Heath, Romford, RM6 4BE | | Map & Directions |
| Network Security Systems | 01375 844010 | | 169 St. Chads Road, Tilbury, RM18 8NL | | Map & Directions |
| Gardiner Intruder Alarms Ltd | 0845 458 2840 | | 11 Flint Street, Grays, RM20 3HA | | Map & Directions |
| Rjl Security Ltd | 01375 850620 | | Redhouse Cottage, Linford Road, Grays, RM16 4LQ | | Map & Directions |
| Paul Humphris Electrical Services Ltd | 07811 712651 | | 324 Crow Lane, Romford, RM7 0HJ | | Map & Directions |
| Giles Security Ltd | 01708 553388 | | Marsh Way, Star Business Centre, Rainham, RM13 8UP | | Map & Directions |
| Platinum Security | 01708 733264 | | 9 Park Lane, Hornchurch, RM11 1BB | | Map & Directions |
| Absoulute Alarms & Security Systems | 01708 702777 | | 83 Balgores Lane, Romford, RM2 6BP | | Map & Directions |
| Select Security Systems | 01375 856339 | | 101 Byron Gardens, Tilbury, RM18 8BE | | Map & Directions |
| I T S Security Services | 01708 554220 | | Po Box 229, Rainham, RM13 8YQ | | Map & Directions |
| Securitech Systems Ltd | 0845 170 7044 | | 162 St. Marys Lane, Upminster, RM14 3BS | | Map & Directions |
| Merrydale Security Administrations Ltd | 01375 856111 | | Merrydale House, Linford Road, Grays, RM16 4LQ | | Map & Directions |
| Comfort Zone | 01708 550455 | | Unit C1, New Road, Suttons Business Park, Rainham, RM13 8DE | | Map & Directions |
| Base Wood Securities | 020 8596 5900 | | 1-2 Princess Parade , New Road , Dagenham, RM10 9LS | | Map & Directions |
| A C L Security Ltd | 01708 749497 | | 34 Jutsums Lane , Romford, RM7 9HH | | Map & Directions |
| Focus Security Systems Ltd | 0800 183 2233 | | 151 Haynes Road , Hornchurch, RM11 2HX | | Map & Directions |
| Phoenix Total Security | 020 8596 7920 | | 297 Wood Lane, Dagenham, RM8 3NH | | Map & Directions |
| Initial Fire & Security | 01708 374541 | | Unit M, Faringdon Avenue, The Business Centre, Romford, RM3 8EN | | Map & Directions |
| Private Eye Security Services Ltd | 0845 056 9781 | | 1112A High Road , Romford, RM6 4AH | | Map & Directions |
| Dolphin Security Services | 020 8597 7000 | | 1045-1047 High Road, Romford, RM6 4AU | | Map & Directions |
| Jenna Solutions | 01277 229292 | | Elms House, Church Road, Harold Wood, Romford, RM3 0JU | | Map & Directions |
| Guardian Security | 01708 223823 | | Unit 6, Warley Street, Upminster Trading Park, Upminster, RM14 3PJ | | Map & Directions |
| Network Security Systems | 0800 037 0266 | | 114 Dock Road, Tilbury, RM18 7BT | | Map & Directions |
| Equator Security Services Ltd | 020 8592 2772 | | Estuary House, 196 Ballards Road, Dagenham, RM10 9AB | | Map & Directions |
| L J B Security | 01708 455060 | | 183-185 Hornchurch Road, Hornchurch, RM12 4TE | | Map & Directions |
| R & D Security Manufacturing Ltd | 01708 453465 | | 22a Station Lane, Hornchurch, RM12 6NJ | | Map & Directions |
| Claymore Security Services | 01708 556704 | | Manor Way, Rainham, RM13 8RH | | Map & Directions |
| Yexley Security Ltd | 01708 640779 | | Unit 15, Warley Street, Upminster Trading Park, Upminster, RM14 3PJ | | Map & Directions |
| Systems Elite | 01279 838509 | | Unit C5, Star Business Centre, Marsh Way, Rainham, RM13 8UP | | Map & Directions |
| Hidden Technology | 01708 631333 | | Unit C5, Fairview Industrial Park/marsh Way, Star Business Centre, Rainham, RM13 8UP | | Map & Directions |
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