BP Summer Screens: Cinderella

High culture comes free at this series of outdoor broadcasts live from the Royal Opera House. This week's showing – relayed to screens in Trafalgar Square and Canada Square Park in Canary Wharf – is Massenet's opera 'Cendrillon'. The performance lasts around three hours. You are welcome to take a picnic and advised to pack a cushion or blanket (no portable seating is permitted). For full details see www.roh.org.uk/whatson/bpbigscreens/index.aspx