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GIVE BLOOD: Today's donation clinics are at St Mary Abbot's Centre in Kensington, the Hop Exchange on Southwark Street, and the Bishopsgate Institute (where, incidentally, you can also check out our new exhibition). Free, just turn up, check site for times and conditions
ART: The big opening today is George Catlin's 19th Century portraits of Native Americans at the National Portrait Gallery. Free, just turn up, until 23 June
MORE ART: CiTiES: All Dimensions at Tokarska Gallery in Walthamstow should be interesting, and its logo looks all Londonisty. All the pictures in the exhibition show the artists' impressions of city life. Free, just turn up, till 17 March
FUTURE CULTURE: See plans for the redevelopment of the Festival Wing of the Southbank Centre – the Queen Elizabeth Hall, Purcell Room, Hayward Gallery complex — which go on show at the multipartite venue today. Free, just turn up, all day
MEDICAL HISTORY: Chris Hilton delivers an entertaining talk (we’ve heard his tales a couple of times — definitely recommended) on London’s medical history, as told through Wellcome Libraries holdings. Free, prebook, 3pm
BIT OF EVERYTHING: Short films, poetry, a talk about someone's apple tree and other diversions at the Caught by the River Social Club, at the Queen's Head, Piccadilly. £5, prebook, 7pm
EARLY BOOGIE: Brilliant idea, this. An early-starting, early finishing indie disco for those who want to boogie at 7pm and be in bed with cocoa by midnight. It's at Drink, Shop, Do in King's Cross. Free, just turn up, 7pm
MUSIC JOURNALISM: Former NME and Time Out music journalist Nick Coleman talks about his memoirs at Dulwich Books. £10, includes book and wine, prebook, 7pm
CUNNING STUNTS ON A BOAT: Watch aerial daredevils Midnight Circus perform onboard the MS Stubnitz in Wood Wharf, tonight and evenings throughout March. £20, prebook, 8pm
GEEK COMEDY: Like memes, Tumblr, Google, laughing? Head to All Your Internet Are Belong To Us. With James Acaster, Adam Larter, Rob Wells, Caroline Mabey and Gareth Morinan. £5, prebook, 8.30pm
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Random London Fact of the Day
Today's fact is from Federica Pojaga, who found this while reading this great article by John Lanchester. Apparently, the first tube train on the whole underground network in the morning is the District Line train leaving Upminster depot at 4.53am. It's the only train active before 5am.
And the award for most trenchantly uninteresting, repetitive weather of the year goes to........London, on 7 March 2013. At least the rain gets a bit more pixellated after 8pm. We'll look forward to that.