UK brides more typically have what is called a 'hen night' rather than a bridal shower. Hen nights generally consist of a group of the brides closest female friends going out for the evening to have fun. This can be as wild or as tame as you like for instance some people in the UK go out clubbing in fancy dress with the sole purpose of getting very drunk whilst others book a nice spa weekend. Games are usually played, the bride often wears a sash proclaiming her 'the hen' as well as a learner plate and veil. I'm sure google will be able to introduce you to the wonderful world of hen nights if you're interested - be warned some of them don't end well!