security:
As an option to prevent the towed coupling being disconnected and towed away when you leave it in a motorway services, we offer two levels of security:

Locking key coupling head:

This neat, low cost hitch lock 



or 

triple lock coupling head:

'The ultimate protection' this indispension cast aluminium locking coupling head.With individual key is secured by anti tamper bolts and locks the car onto the tow-ball or locks the coupling so that it cannot be attached, 'effectively bulletproof!'
NO. plates:
Good quality number plates - UK, Euro, or traditional plates.
Reflective towing triangles:
Fixed with suction caps with the strap which fits around the door for security.