We've got loads of culture, it's just that the rest of the world has appropriated it and no longer recognises it as ours.

E.g. the suit. George Bryan "Beau" Brummell is responsible for that (he died 'shabby and insane' in France, perfectly British). It could easily have gone a different way and we'd all be wearing lederhosen to work, weddings, and funerals, but there you go.