Inclined to agree with Sam here. No-one suggested all the batting records be changed because players now wear helmets and protection for pretty much the entire body. Back in the day if you tired to hook or pull a bowler of (say) Flintoff's pace you were literally taking your life in your hands. & As for swimmers having to use inferior kit becuase of their sponsors: HTFU, do want to win or do you want the money?
There's no "protection of athletes" argument here as there is with drugs; I can't imagine any long-term health issues from prolonged usage of swimming costumes.
Anyway, in answer to the question posed by the thread: any event reliant on the great British weather.