Two-month festival of outdoor street theatre, cabaret, music and film screenings. These include Bring and Share in the Green Room, a vinyl-swapping DIY club night (selected weekends 10pm-1am). This week's highlights include 'The Black Maze' – an interactive theatre experience in which audience members find their way in solitude through a dark environment created by Stan's Cafe Theatre Company (Aug 5-8 1-7pm). For details visit the website: www.nationaltheatre.org.uk/wts.