As title, i haven't bought one since all of the rules changed, what documents do you need ?

None, just order on ebay

Local shop wants a registration document.

What do you need, I can do numberplates

V5 or v70 And driving licence.

[Edited on 14/4/16 by big_wasa]

Just order online, you don't need anything.

I've ordered online a number of times and not needed anything.

Try...https://www.myshowplates.com/

All sorted now thanks, reg doc and driving licence plus £8 job done.