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BLOOD: Today’s opportunities to donate blood are at Nbc Universal in the West End and Brewers Hall. See site for terms and conditions
FREE FILM FESTIVAL: A rich programme of free films in unusual venues characterises the New Cross and Deptford Free Film Festival, which will last for nine days. You can just turn up and enjoy the film in most of the venues. Free, until 4 May
ART SCREENING: Parasol Unit Foundation in Angel hosts a whole-day screening of New Dream Machine Project II, an art project realised back in 2013. The short film explores the relationship between Beat Culture and Middle-Eastern artistic traditions. Free, just turn up, until tomorrow open 10am-8pm
FWW GUIDED WALK: The Wild Colonial Boy is the title of this walk led by a Blue Badge London guide. Explore the vital contribution and sacrifice of Britain’s Empire during the Great War, walking through London’s Green Park war memorials. Meet at Green Park tube station, Buckingham Palace exit. £10/£8, prebook by email, 11am
POP-UP: Enjoy a glass of wine at the Barley Mow Centre in Chiswick, for a one-off pop-up organised by Squirrel Wines. Free, just turn up, 11.30am-5.30pm
CYCLING GATHERING: Critical Mass cycle ride celebrates more than 20 years of meeting and cycling in cities all over the world. All cyclists are welcome to meet under Waterloo Bridge on the South Bank outside BFI, for a ride around the city. Free, just turn up, 6.30pm
EAT DIFFERENT: If you feel like you want to try something different to eat, like edible insects, then you should head to Eat Grub supper club, taking place at the Hothouse Rooftop in London Fields. £25, prebook, 6.30pm or 8.30pm
JAZZ NIGHT: Listen to some jazz music at The Tea Box in Richmond. Tonight’s performer is Emily Saunders who will entertain the audience with acoustic-based jazz and poetic lyrics. £5 (if prebook)/£6 (on the door), prebook by phone, 7.30pm
SOUTHBANK: Enjoy an evening of Indian Carnatic vocal music at the Southbank Centre with maestro of the Saraswati veena, Prince Rama Varmapart. Part of Southbank’s classical season 2014. £25/£20, prebook, 7.45pm
ROYAL INSTITUTION: The Science of Laughter is not a comedy gig, it’s a lecture taking place at the Royal Institution tonight. An expert will explore the science of laughter and the reasons behind laughing. £17/£11, prebook, 8pm
Have You Tried …
…Wingit? If you want even more ideas on things to do in London then new app Wingit uses an algorithm to scan social networks and find great London events happening near you in real-time. From performances to pop-ups, screenings to street art, download the free app today to see what’s going on just round the corner.
This week’s Things To Do In London is sponsored by Wingit.
Good Cause of the Day
Tomorrow Saturday 26 April, The Clerkenwell & Islington Guides’ Association leads the guided walk Islington: town and country; rich and poor. The walk will cover Islington’s development from rural idyll to urban chic, and will end at Freightliners Farm. Meeting point outside Islington Town Hall, with all the money raised going to support of The Clerkenwell & Islington Guides’ Association, which is a charity. £5, just turn up, 11am
London Connection Puzzle
Your full set of clues is: ST SEPULCHRE, ST GILES, ST BOTOLPH and ST BOTOLPH (again). What particularly connects these four London churches? No need to email in, as we already have a winner.
Name That Pub!
In which London pub would you find this horny display? There’s a big clue in there somewhere, which might lead you to the correct answer in our new Best London Pubs microsite.
Every Friday in April, we’ll be picking one email subscriber at random to win a Londonist-themed goody bag. So if you’re reading this on our website, sign up to our 7am newsletter for your chance to win. If you’re already subscribed, let your friends know — particularly the ones who are likely to share the prize if they win.