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GIVE BLOOD: Today’s opportunity to donate blood is at St Olave Parish Hall on Fenchurch Street. Free, just turn up, see site for times and conditions
WONDER: Get brainy at Barbican's Wonder Street Fair with drop in activities, performances and demonstrations, all free. You can even knit a neurone! Free, just turn up, until 9 April
HUGUENOTS: The Huguenots, French Protestant refugees who fled Catholic France in the 16th and 17th centuries, made a huge contribution to London. To celebrate their talent, a programme of walks, talks and events is taking place until 21 April, and today you'll find talks and a screening at The Water Poet. £8 (includes a glass of wine), prebook, 7pm
CLOCK: Clock lovers get ready, Helen Jacobsen is talking today at The Wallace Collection about The Avignon Clock, an 18th century gilted bronze beauty. Free, just turn up, 1pm
POETRY: David Parry has turned the Gruntlers into Allthing, and is curating an all-afternoon poetry moot at the Poetry Cafe. £5/£3, just turn up, 2.30pm
SCIENCE AND RELIGION: A talk at Gresham College on the past 10 years of the Boyle Lectures and their contribution to the dialogue between Christianity and our understanding of the natural world. Free, just turn up, 6pm
OPEN MIC: Dancers, singers, musicians, poets and comedians get their time in the spotlight at this open mic night at Rich Mix. Those who want to perform should email beforehand, but there is a Wild Card slot on the night too. Free, just turn up, 7pm
COMEDY: BBC Radio 6 presenter Shaun Keaveny is joined by a stella comedy line-up including Tom Stade, Joe Lycett, Sarah-Louise Young and Kerry Godliman, tonight at Pleasance Theatre. £9/£8.50, prebook, 7.30pm
DOCTOR WHO: The Monarch in Camden's sci-fi pub quiz is back, and it's about time. Test your knowledge of Doctor Who and, if you don't win, simply travel back in time two hours and try again. £2, just turn up, 8pm
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Random London Fact of the Day
Hay's Galleria near HMS Belfast is a reclaimed wharf now given over to shops and restaurants. It gets its name from Alexander Hay, who bought property on the site in 1651. Hay was a brewer, but later branched out into manufacturing wooden pipes to carry water, not least from the New River — a manmade watercourse carrying fresh drinking water from Hertfordshire to London, which celebrates its 400th anniversary this year.
Spring's arse is finally approaching gear, yet conditions remain just that little bit too cold, just a little bit too breezy, and and just that little bit too cloudy for anyone to squeal with delight. And there's rain on the way. In summary: OH COME ON, get warm already!