Just came into possesion of a very nice little towball type hitch.
The Hitch comes with -
A Safety pin Quick release with a 10mm diametre Female thread one end, and a 10mm diametre Male thread the other, a spare spring loaded "R" clip and trace tether. £10+ £2.50 P&P each.
Looks like I'll be doing away with my Universal Joint and applying this to my trailer asap
Tom
Update of better pictures....