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BLOOD: Today's opportunity to donate blood is at Brewers Hall in the City of London. Free, see site for terms and conditions
ILLLDN: Three illustrators inspired by London life take part in the group art show, illLDN, at Rich Mix. Come along to see London life depicted in still life, urban portrait work and cartoon form. Free, just turn up, until 28 July
DEATH ON THE THAMES: Why not spend a sunny London afternoon finding out about human remains discovered on the Thames foreshore, with Museum of London Archaeology's Osteoarchaeologists? Happy Tuesday! £6, prebook, 3pm
CYCLE PROTEST: The London Cycling Campaign is organising another protest about road safety following yesterday's fatal accident in Holborn. The protest ride starts at Russell Square. Free, just turn up, 6.30pm
ART AND SCIENCE: Learn about the scientists who raced to discover the structure of DNA, and why photo 51 changed the course of science in the 20th century at this event in conjunction with King's Cultural Institute's Photo 51 exhibition. £5, prebook, 7pm
BOOK: Philipp Meyer talks about his new novel The Son with Chris Cleave at Lutyens & Rubinstein. £8, prebook, 7pm
YOUR LUNCH: Find out what your lunch says about you and examine how food has become a status symbol, with a panel discussion at The House of St Barnabas in Soho. £11, prebook, 7.30pm
LITERARY SALOON: Poltroon literary saloon (that's not a typo) is at the Betsey Trotwood. £3/£1, just turn up, 7.30pm
SILENT FILM: The Last Laugh, a 1924 German silent film screens tonight at Enfield Grammar School Hall as part of Mimetic Festival 2013. If total silence makes you nervy then don't worry, there will be live piano accompaniment from British Film Institute silent film pianist Costas Fotopoulos. £6.50/£5.50, prebook, 7.30pm
FUNNY LIES: It’s lies, we tell you, all lies. Except this bit: Alex Horne is at the Battersea Arts Centre previewing his new show Lies. May or may not contain panda. £10/£8, prebook, 8pm
NAUTICAL EYECANDY: Ian Visits informs us that the cruise ship Silver Cloud will be passing through Tower Bridge this evening. Not particularly rare, but always an impressive sight. Free, just turn up, 8.30pm
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Good Cause of the Day
Get on your bike for a good cause this September, with the London Bikeathon 2013. Raising money for Leukaemia & Lymphoma Research, a UK charity dedicated to improving the lives of patients with all types of blood cancer, participants in the London Bikeathon can choose from a 100 mile, 52 mile, or 26 mile route. Detailed route information can be found online, along with the opportunity to enter. £50/£25, register online, Sunday 15 September from 8am
London Connection Puzzle
As ever, this week's puzzle is set by last week's winner, in this case Emma Jeffries. The first clue-word is MT. A second clue-word will appear tomorrow.
London Weather, by Inclement Attlee
They say that only three things in life are inevitable: death, taxes, and an Eric Pickles fat joke on any BBC comedy quiz show. To that list, we must almost add an unexpected fourth: never-ending sunshine. Yet today sees a break. We'll still receive plenty of rays, but now tempered by a big fat hunk of cloud. This intruding, vapourous rudesby will last only one day, then we're back to full beam.