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BLOOD: Today’s opportunities to donate blood are at British School of Osteopathy in Trinity Street, Hilton Hotel at the Tower of London, Paddington Central in Sheldon Square and Hornsey Parish Church in Muswell Hill. See site for terms and conditions
PING PONG: Find free-admission ping pong tables in Exchange Square and get ready to play. Table tennis coaches will be available both to teach and challenge. Free, just turn up, 11am-3pm & 4pm-7.30pm
BRITISH-AMERICAN POLITICS: Senior British diplomat Sir Nigel Sheinwald discusses America and Britain's changing roles in the world at the British Library tonight. The event looks at why maintaining strong links between the countries is important for both sides. £8/£6/£5, prebook, 6.30pm
LIBRARY TOUR: See behind the scenes at Putney Library, including parts of the building that are normally off limits to the public, including staff areas. Free, prebook, 6.30pm
SPOKEN WORD: The Crystal Palace Festival takes place in June, but there is an early fund-raising event tonight. Head to Kingswood Estate in Dulwich for An Audience With Howard Marks, who will perform his spoken word show, Scholar, Smuggler, Prisoner, Scribe. £12.50, prebook, 7pm
FEMINIST THEATRE: Ten Women at Ovalhouse is a theatre show designed to question the ideas of beauty that we are constantly fed, the use of over-sexualised women in advertising, and how this affects women's self-perception. £5, prebook, 7.30pm
OIL PIPELINE: Head to Riverside Studios for a screening of Pipeline by DocHouse. The film is about the lives of people living alongside a Trans-Siberian oil pipeline, and is followed by a Skype Q&A with director Vitaly Mansky. £7/£5, prebook, 7.30pm
LIVE MUSIC: The Coveryard hosts a live music evening at the Chainstore at Trinity Buoy Wharf. The evening has includes performers from several musical genres, including folk artist Sam Brookes, and Stratford-raised singer Denai Moore who will perform alongside a live chamber orchestra. £12/£14, prebook, 8pm
INTELLIGENCE SERVICES: London Fortean Society meets at Dirty Dicks to hear Mark Pilkington, author of Mirage Men, talk about psychological manipulation and deception practised by American and British intelligence service, as revealed in documents released by Wikileaks. £3/£2, just turn up, 8pm
SARA PASCOE: Comedian Sara Pascoe is at Soho Theatre for the first in a three-day run of her show, Sara Pascoe vs the Truth, in which she discusses the subjectiveness of everything we believe in life. £12.50/£10, prebook, 9.15pm
Find more London events in our Free & Cheap events listings.
Good Cause of the Day
Book now for tickets to see soul singer Tanya Cristina perform songs from her debut album Small Woman, Big Voice, at Kings Place on Saturday. The concert is in aid of Macmillan Cancer Care, and tickets, from £13.50, can be prebooked here.
London Connection Puzzle
Your cluewords so far have been WARWICK AVENUE and CHELSEA EMBANKMENT. Today's addition is RUSSELL SQUARE. What's the London connection? No need to email in, as we already have a winner.
From the Archive
In 2012, when a larger-than-life banner of the Royal Family went up on the side of Sea Containers House in advance of the Jubilee celebrations, it wasn't long before Londoners were adding their own touches. Cue the Royal Family alongside Avengers, footballer John Terry, and one suggestion of what Prince Charles was really thinking.
Street Art Spotter
This week's photo puzzles are all themed around street art. Today's piece concerns a certain R2 unit, whom we spotted on the streets about a year ago. Where in London did we snap him, and is he still there?