The Koestler Trust 50th anniversary exhibition – in pictures

Birds of a Feather, HMP Pentonville. Si Pickard commended award for pottery or sculpture Photograph: Courtesy of the Koestler Trust

Blob Three, HMP Shepton Mallet. Maggi Hambling bronze award for oil or acrylics Photograph: Courtesy of the Koestler Trust

Conversations, HMP Stafford Photograph: Courtesy of the Koestler Trust

Escape(ism), HMP Send Photograph: Courtesy of the Koestler Trust

On the Landing, HMP Whatton. Highly commended award for craft Photograph: Courtesy of the Koestler Trust

Queen of the Night, HMP Wakefield Photograph: Courtesy of the Koestler Trust

Self-portrait of Expression, HMP Isle of Wight. G&J commended award for painting or drawing Photograph: Courtesy of the Koestler Trust

Two Heads Better Than One, Ashworth Hospital. Leopold de Rothschild Charitable Trust platinum award for pottery or sculpture Photograph: Courtesy of the Koestler Trust

Untitled, HMYOI Onley. Commended award for craft Photograph: Courtesy of the Koestler Trust

Wasted!, HMP Channings Wood. James Wood silver award for oil or acrylics Photograph: Courtesy of the Koestler Trust