Please take our advise and if you have the chance this weekend pay a visit to Art Barter. It's a chance to barter for art by 50 London based established and emerging artists including Peter Blake, Tracey Emin, Gavin Turk, Mat Collishaw, Gary Hume, Valery Lippens, Abigail Lane and Boo Saville. You can exchange anything except money! On show at The Rag Factory, 16-18 Heneage Street, London E1 5LJ. Visit Fri 27. Sat 28 10am-7pm and Sun 29. 11-9pm

Valery Lippens infront of ‘Chocol’art’ made by Sir Peter Blake.