From the LION RALLY site...

Over 25 years old and still going strong the Lion Rally is held every year in early June and is one of the largest bike rallies in the Thames Valley area. Starting from Friday afternoon and running until Sunday you will get a wide range of entertainment, stalls, live bands, real ale bar and a chance to chill out with friends, existing and yet to be discovered.

A lovely flat camping field is provided for you as are proper flushing toilets.

Day visitors are most welcome, under 12's get in free