So apparently there were 450 M635CSi's right-hand-drive official UK cars...
never knew that as I myself never saw one while I was in London for about 4 years (early '90s) but I guess that's understandable since there were so few...
and they decided to badge those ''M6'' just like US cars.
in the rest of Europe though these cars were simply badged ''M'' back & front while the official name was ''M635CSi'' same as with M535i's...
Yes, UK is part of the European market but with the RHD thing we all know how this some times affects the cars sold there (or sometimes NOT sold!). As for these pics these come obviously (check the size of the plate) from the US.