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BLOOD: Today’s opportunities to donate blood are at the YMCA Hall in Barbican, The Hop Exchange is Southwark Street and Selhurst Park Stadium. Free, see site for terms and conditions
FILM FESTIVAL: Camberwell Free Film Festival returns for its second edition and promises a rich programme of classic, contemporary and cult films in unusual and quirky venues around Camberwell. Check website for full program. Free, until 30 March
FOOD POP-UP: The Pickled Fork is a food pop-up duo comprising two young traveller chefs. Find them at The Brixton Diner on Coldharbour Lane for a few days, serving an American diner-style three-course set menu. £20, prebook by email, various dates until 30 March
COOLWALK: CoolTan Arts charity presents the CoolWalk, focused on discovering hidden parts of Camberwell and Brixton. The theme is 'Freedom', meeting point is at Camberwell Library, donations welcome. Free, just turn up, 12.30-4pm
IMPERIAL COLLEGE: Explore the diversity and adaptability, the shapes and the sizes of the Life on Earth at Imperial College. This event is part of the College's Imperial Fringe series. Free, just turn up, 5pm
GET THE GLOSS: Join experts in skincare, wellbeing, nutrition and fitness at the Liberty shop in central London. Drink and nibbles included. Free, just turn up, 5-7pm
FREE DRINK: Get a free taste of rum at Selfridges' rum sampling evening, featuring a range of the best from the wine shop and the Global Rum Ambassador. Free, just turn up, 6-8.30pm
CITY & ART: Listen to guide Alexandra Epps at the St Bride Institute, who will tell you about London and its richness of public artwork. £10, just turn up, 6.30pm
SCIENCE TALK: The compatibility gene is a talk about the role that the immune system plays in compatibility, whether in tissue transplants or sexual attraction. Takes place at the Royal Institution. £12/£8, prebook, 7pm
MUSIC & GEOMETRY: A Hidden Order is an exhibition about the relationship between music and geometry, taking place at the Prince’s School Of Traditional Arts in Shoreditch, until 28 March. It features two multimedia performances where live sounds are transformed into realtime graphics, one tonight and another one on 27 March. £8/£5, prebook, 7pm
CAMPFIRE SONGS: Looking for an antidote to urban life? Learn a range of songs perfect for singing on the campsite with your chums. This soulful session takes place at the Old Town Hall, Haverstock Hill, Camden. £10/£15, prebook, 7.30pm
Our friends at coffee start-up Pact are on a mission to get London drinking better, fresher coffee. Sign up here for coffee deliveries using voucher code ldn14 and Pact will send you your first 250g bag for just £1 with free P&P. For more info and T&Cs click here.
Good Cause of the Day
Head to the Camden Jazz Cafe for an evening of fun and charity. It's Wah Wah 45′s night out dedicated to DJ Simon Goss, including live DJs. All the proceeds go to The Roy Castle Lung Cancer Foundation. £10/£15, prebook, 7pm
London Connection Puzzle
Previous clues were WALWORTH and BATTERSEA PARK. Your third clue is STRAND. Can you work out what connects these three London locations? No need to email in, as we already had a winner from just two clues.
From the Archive
Last year on this day we found a lot of shoes in a tree opposite the MI6 building, and we asked people on Facebook about the meaning of it all. Cue, lots of funny and unexpected replies.