Bruce Asbestos unleashes a mischievous monster, Alan Charlton shows off 50 years of monochrome mastery and Lady With a Guitar gets a fresh perspective – all in your weekly dispatch

Bruce Asbestos: Bootleg Shreg 2
The guy who put a huge inflatable snail in Tate’s Turbine Hall brings his wacky comic style to Exeter for a show about Shreg, a green ogre that breaches absolutely zero copyright rules.
• Exeter Phoenix Gallery, from 25 April to 20 June