jumpsuits are a one-piece clothing which were originally designed for sportsmen/sportswomen to keep them warm from the cold like skydivers and car racers. Also they are known as baby clothing. After that it entered fashion and became a trend in 2010. On the other hand playsuits are similar to jumpsuits in shape except for being a lot shorter (just like shorts) which is also inspired from baby clothing. You should be able to find them in New Look, Dorothy Perkins, Peacocks, River Island, Miss Selfridge among others.