An exhibition of English rituals is on display at the Horniman museum, London. Photograph: Sara Hannant Theatre
Abigail's Party, Wyndham's Theatre, WC2, to 1 Sep, menierchocolatefactory.com The Menier Chocolate Factory's revival of Mike Leigh's cult classic transfers to the West End.
Picasso Prints: The Vollard Suite, British Museum, WC1, to 2 Sep, britishmuseum.org A multitude of brilliant prints from the 1930s proves, again, there's no such thing as too much Picasso.
Mummers, Maypoles & Milkmaids: A Journey Through The English Ritual Year, Horniman Museum, to 9 Sep, horniman.ac.uk Folklore, myth and tradition mingle in 50 photographs of English rituals taken throughout the year.
Antony's Meltdown: Diamanda Galas, Southbank Centre, SE1, meltdown.southbankcentre.co.uk, to 12 Aug. Critically acclaimed political singer and artist Diamanda Galas performs as part of the Meltdown festival, directed this year by Antony of Antony and the Johnsons.
Richard Sandling's Perfect Movie, Leicester Square Theatre, tonight only, leicestersquaretheatre.com Film buff Sandling is the master of ceremonies at this regular comic celebration of the cinematic arts, featuring Colin Hoult and James Bachman.
Iain M Banks, Kings Place, N1, tonight only, kingsplace.co.uk The fiction and sci-fi author discusses his latest book with Professor John Mullan.
Canadian Literary Festival, Leytonstone Library, 6-8 Church Lane, E11, to 3 Aug, haliburtonsociety.ca Olympics celebration in literature with Canadian authors reading and talking about their work.
Not Another Presents, Cargo, Rivington Street, EC2, cargo-london.com Misha B plays live while Emily Rawson and Bakery Boys play cutting-edge dubstep and hip-hop.