Security Guard & Patrol Service in Watford, Hertfordshire
| Name & Address | Phone # | Website |
| Black & White Keyholding Services Ltd Marchwood House, Watford, Hertfordshire WD25 9NN | 01923 448754 |  |
| Crusader Security Services Ltd 23 St Johns Road, Watford, Hertfordshire WD17 1PX | 01923 298300 | |
| Kings Security Systems Ltd 480 St Albans Road, Watford, Hertfordshire WD24 6QU | 01923 690810 | |
| Security Design Associates (1979) Ltd Axis 7, Watford, Hertfordshire WD24 4TP | 01923 211550 | |
| Total Security Protection Unit 6/Century Court, Watford, Hertfordshire WD18 9RS | 01923 228866 |  |
