Koestler Open House Art Sale

The Koestler Trust is the UK’s leading prison arts charity, and its Open House Summer Sale will be the first chance to see and buy amazing artwork - proceeds from which are split between the artist, the Trust and Victim Support. Prices start at a jaw-dropping £1 and even if you don't want to invest, it's free to look around the gallery and there's tea and cake on sale to whet your whistles too.