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GIVE BLOOD: Today's donation clinics are at Brewers Hall in the City and the West End Donor Centre in Margaret Street. Free, just turn up, see site for times and conditions
COMPUTERS: Find out what the consequences can be when computers make errors, at a Gresham lecture at Barnard's Inn Hall. Free, just turn up, 6pm
EUROPE: Former French Prime Minister Alain Juppé explains why he still believes in the European Union, at the London School of Economics. Free, just turn up, 6.30pm
WEATHER: The BBC's David Shukman takes his earnest tones to the Royal Society, where he speaks on how forecasters can predict and report on adverse weather conditions. We have our own ideas about that — see the daily weather report at the bottom of these articles each day. Free, just turn up, 6.30pm
BOOKS: Dervla Murphy and Sara Wheeler talk about women and travel writing at the Royal Society of Literature. £8, prebook, 7pm
MUSIC: James Yuill melds sounds from his guitar, decks, laptop and voice to create ‘folktronica’ that can be startlingly original. See him at the Sebright Arms tonight. £10, prebook, 7pm
SOOO SHOREDITCH: If you’re over in EC2A and looking for unusual distractions, try Butchery Bingo at Shoreditch Butchery (£2, 7pm), a ukulele hootenanny at Queen of Hoxton (free, 7.30pm), or speed dating at The Book Club (£13, 7pm).
OFFENCE: Nick Cohen talks about censorship, freedom of speech and the need to offend at Skeptics in the Pub in Camden. This is likely to be busy so get there early. £3, just turn up, 7.30pm
COMEDY: Mark Thomas is taking his People’s Manifesto out on tour before recording more shows forRadio 4. Take your ideas for making the country a better place to the Soho Theatre. £10, prebook, 9.15pm
Random London Fact of the Day
Hatton Garden is famous for, and almost synonymous for, the diamond trade. But the street has other claims to fame. It was once home to Sir Hiram Maxim (1840-1916), who invented both the machine gun and the fire sprinkler here, among other things.
Good Cause of the Day
On 24 March, the National Literacy Trust is organising the first ever UK Fun Run to be run exclusively for an educational or literacy-focussed charity. The 5km and 10km race will take place in Victoria Park and begin at 11am. With a Where’s Wally? theme, they are hoping to attract a wide range of participants, young and old, from the artistic and literary community. Register now for £20, with an expected sponsorship total of at least £100. And make sure you've got a good Where's Wally costume!
Last week, we asked you to send in pictures of the weather, as doodled by infants. We thought it might brighten up this column, and regruntle a weather-jaded population, grown weary by the leaden skies. Alas, no one got in touch. As our old grandmother used to say, if you can't persuade an unpaid child workforce to decorate your website, you just have to do it for yourself. So here's our stab at today's weather, as painted in approximately 94 seconds on an iPad, with little reference to the actual forecast. If you think your infant could do better, coax them into drawing tomorrow's skies, and send photos of their handiwork to firstname.lastname@example.org.