In reply to tlm:
When I was at uni in the 90s, there was an annual sponsored "naked run" from Harrods back to the student union building by the Royal Albert Hall. There was a prize for last place!
I was in the TV club and we used to film the event and flog the video to the tabloids for RAG donations. Most amusing for the tourists, but I doubt the people at Harrods & Kensington thought so! Not sure if it's still going - it probably never officially happened.