I went on the bay and searched for MG ZS numberplate LEDS and it came up with these long shaped push fit ones (sort of the same shape as your average plug socket fuse) I went to fit them today and it turns out there was normal 'wedge' 501 push fits in there! Luckily i had some of these in LED form already so got them fitted, but bit annoyed i payed a tenner for a coupld of LEDs i dont need now
EDIT: Not the same seller, but was the same type of bulbs i bought and dont fit
http://cgi.ebay.co.uk/ROVER-MG-ZS-20...item20b696b141