Security Systems in Londonderry
| Ba Security Systems 01642 680177 | Yarm, County Durham TS15 9NG 18.5 mi 81 Forest Lane | Call NowDetails |
| Rennyco 01325 480502 | Darlington, County Durham DL3 0QT 22.2 mi West Tree Buildings | Call NowDetails |
| D C Electronic Security 07904 509270 | Stockton-on-Tees, County Durham TS16 0HT 22.3 mi 3 Burnmoor Drive | Call NowDetails |
| Cam Tec Systems 01325 319998 | Newton Aycliffe, County Durham DL5 6BF 29.0 mi 2 Maple Way | Call NowDetails |
| Ram Security 01642 942999 | Stockton-on-Tees, County Durham TS19 9BA 29.1 mi 29 Ragpath Lane | Call NowDetails |