Hall & Kay Security Engineering

Statham Grove, London, N18 1RE

162 Trafalgar Road, London, SE10 9TZ

Kemp House, 160 City Road London, London, EC1V 2NX

25 Camperdown Street, Sovereign Close, London, E1 8DZ

White Collar Factory – unit 311, 1 Old Street Yard, London, EC1Y 8AF

Suite 34 New House, 67-68 Hatton Garden, London, EC1N 8JY

Tower Bridge Business Centre,, 46-48 East Smithfield,, E1W 1AW

14 Angerstein Business Park, Horn Lane, London, SE10 0RT

145 High Road, London, N15 6DQ

86-90 Paul Street, London, EC2A 4NE