Its 12v already. It was stood for approx two years. When I pulled her out yesterday all I had to do was pump the tyres back up to full pressure, one was down to 12 psi the other 18. Brakes work nicely and the hitch moves well. Ill get some pics of under (hadn't thought of that) but from when I looked before I'm pretty sure its in good shape. Do you think it would be worth painting as I have some NATO green paint left from the landy The ID panels have been painted over previously but with some careful scraping the numbers are visible...
Not sure about sockets inside as its full of stuff atm but haven't noticed any yet... only a big plate saying what to do in case of electric shock.

If you can stencil the numbers back on after painting, someone will appreciate the effort if they're after a standard looking military trailer, otherwise just a lick of paint will be worth it imho, presentation is everything

With being stood for a few years, the wheel bearings will be worth replacing ( can't see them being much to do ), check the bushes as well whilst you're under there.

If your serious about selling in the future, drop me a pm as this could be what i'm after

Cheers for all the advice. I think Im gonna go for a spruce up and service and see what interest there is. Ill keep her original as possible, clean up the plates properly and re-stencil whats there and Ive got a few bits of kit that will go with her.

Cheers again