- Showset 247 Ltd (Address: Unit 5, Wrotham Business Park, Wrotham Park, Barnet EN5 4SZ)Location: St AlbansCategory: Security Companies
- A A A Security (Address: 46 Hamilton Rd, Kings Langley WD4 8PZ)Location: St AlbansCategory: Security Companies
- Harpenden Alarms Ltd (Address: 6 Silver Court, Watchmead, Welwyn Garden City AL7 1LT)Location: St AlbansCategory: Security Companies
- Cannon Guards Security Ltd (Address: Britannia House, Leagrave Rd, Luton LU3 1RJ)Location: St AlbansCategory: Security Companies
- DCA Security Systems (Address: 38 Follett Drive, Abbots Langley WD5 0LP)Location: St AlbansCategory: Security Companies
- Anchor Sound & Security (Address: Manor Wharf, 20 Old Mill Road, Kings Langley WD4 8QT)Location: St AlbansCategory: Security Companies
- Ranger Security Systems (Address: 3 Fox Close, Borehamwood WD6 3HS)Location: St AlbansCategory: Security Companies
- SQR Security Solutions Ltd (Address: 2 Athenaeum Rd, London N20 9AE)Location: St AlbansCategory: Security Companies
- Planet Facilities Ltd (Address: Unit 5, Oxen Ind Est, Oxen Rd, Luton LU2 0DX)Location: St AlbansCategory: Security Companies
- AK Security (Address: 37 Grove Park, London NW9 0LA)Location: St AlbansCategory: Security Companies
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