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BLOOD: Today’s opportunities to donate blood are at Leytonstone Methodist Church, Sainsbury’s in Sydenham and AFC Wimbledon in Kingston. See site for terms and conditions
COOL MIRRORS AND STUFF: Clerkenwell Design Week starts today. Highlights include an infinite mirror beneath St John’s Gatehouse, but the packed programme contains many other treasures of the three-day event. Times and prices vary
POP-UP CONCERTS: Onyx Brass, one of Britain’s leading brass quintets, holds a series of free pop-up concerts across the city, starting at 10am on the steps of St Paul’s, then City Hall at 12.30pm, Victoria Embankment Gardens at 1.45pm and Hyde park Bandstand at 3.30pm. Free, just turn up, from 1oam
PONGATHON: Head to Rich Mix for an evening of ping pong and live entertainment. Pongathon is a ping pong tournament with a backdrop of music, art and other games. Free to enter, pay and prebook to play, 6pm-11pm
FREE OPERA: Head to Trafalgar Square for a free screening of the Royal Opera House‘s performance of La traviata. Free, just turn up, 6.30pm
FILM QUIZ: You’re Gonna Need A Bigger Boat at Hackney Attic is a two-hour film quiz projected on a big screen. £4, prebook, 6.30pm
FILM SCREENINGS: Short Sighted Cinema is at Ritzy Brixton for an evening of short films with a theme of ‘Commuter’. £4/£3, prebook, 7.30pm
WANDSWORTH HISTORY: The Wandsworth Museum has a talk, London’s Rubbish – Two Centuries of Dirt, Dust & Disease in the Metropolis, with author Peter Hounsell. £6, prebook, 7.30pm
LOLITICS: Head to The Black Heart in Camden for an evening of political comedy with enforced niceness — the comedians don’t pick on the audience, and the audience aren’t allowed to heckle the comedians. £3, just turn up, 8.30pm
Find more London events in our Free & Cheap events listings.
Good Cause of the Day
This Thursday 22 May join the charity event An Evening in the Pink which takes place at The Black Lion in Hammersmith. The evening is a food and wine tasting focusing on rosé wines — pink dresses are welcome. Money raised will support The Pink Ribbon Foundation for breast cancer research. £25, prebook, 7pm
London Connection Puzzle
A new puzzle starts today, set by last week’s winner Thomas Barrett. Your first clue is LINCOLN’S INN FIELDS. Don’t email your solution in just yet — please wait for clue number 2 tomorrow — but have a think about possible themes.
From the Archive
Fancy something sweet? See our round-up of London’s best chocolate shops, which we published on this day last year.
Tomb It May Concern
This week’s picture puzzles all have something of the grave about them. Today’s puzzle is fairly easy, or at least Google-able. Where in London would you find this German gravestone? Who’s buried there? And why? Leave a comment on this article if you think you know it. (If you’re reading in the email version, the article is here.)