Commons were used by villagers in ancient times to graze stock and gather firewood. Most were enclosed in the 19th century but local campaigners saved Wimbledon’s. It is notable for having a public golf course where you have to wear a red top to play for safety reasons, and of course it is well known as the home of the Wombles. Look out for them!
You are looking for a half litre plastic box that should be big enough to hold small TBs. Don't forget to note down the value of the letter X if you want to find the bonus cache.
This cache has been placed with the kind permission of the Wimbledon Common Rangers.