Just had the grey/black union jack fitted last week,was going to buy the official decal from mini dorchester for 115 then another 115 for fitting.
However bought the same blackjack decal from graphic_mania on ebay for 25 quid and got
it fitted for 50 quid,saving myself a fortune!!
heres the link,with a few photos of the final result:UNION JACK ROOF GRAPHIC! To Fit BMW Mini | eBay