The Royal Institute of British Architects has announced the shortlist for the 2015 RIBA Stephen Lawrence Prize. The prize, set up in memory of the teenager who was setting out on the road to becoming an architect when he was murdered in 1993, and sponsored by the Marco Goldschmied Foundation, is intended to encourage fresh architecture talent and reward the best examples of projects that have a construction budget of less than £1 million. A South London house built around a pear tree; a fishing hut in Hampshire; a seaside stage and shelter in West Sussex; a living laboratory built from rubbish in Brighton; a converted eighteenth-century threshing barn in Kent; a Wiltshire garden retreat and a low-energy house in Somerset feature on the shortlist: Acoustic Shells, West Sussex by Flanagan Lawrence, Ancient Party Barn, Kent by Liddicoat & Goldhill LLP, Brighton