The legendary (number 1, apparently) Bristol Juggling Convention! A staple of the juggling circuit in the UK. Lasting a whopping 9 days this is a relaxed event with some workshops and a show. There's also a tradition of board games and a poker tournament.
Be there or be square!
Location: Woodhouse Park, Fernhill, Almondsbury, South Gloucestershire, BS32 4LX
More details on their website.