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BLOOD: Today’s opportunity to donate blood is at St Olave's Parish Hall on Fenchurch Street. Free, see site for terms and conditions
SUMMER MUSIC: A series of Friday lunchtime summer concerts at St Andrew by the Wardrobe church (yes, that is really the name) starts today with the world's only cello and bass quartet. Free, just turn up, 12.30pm
SCANDI-SUMMER: Grab a Swedish-style hotdog and kick back with a drink in Rekorderlig's Midsummer House by the lake in Victoria Park. £10, prebook, until 5 July
LAB FILM: Celebrating the work of emergent filmmakers, The Lab Film Festival is a new laboratory to nurture new ideas, projects and visions around film. Short film screenings, talks, workshops and events take place across east London. Free, just turn up, until 30 June
GDIF: Greenwich and Dockland International Festival starts today with a free programme of outdoor theatre, circus and aerial performances. Oh, and a beached whale. Free, check site for listings, until 29 June
STREET FEST: A summer solstice to celebrate the heritage of All Saints Road takes place with live music, street food, and some interesting workshops including guitar stringing, hat creating and bread making. Free, just turn up, until 22 June
JANE AUSTEN IN BAGHDAD: The Space Between, a week long photographic exhibition to mark Refugee Week, is accompanied by a series of lunch-time talks by different female refugees. Finishing off the week is May Wit Wit, an Iraqi lecturer who fled Baghdad at the height of violence with the help of a BBC correspondent and CARA. May will read from her bestselling novel, Talking About Jane Austen in Baghdad. Free, RSVP to email@example.com, 1pm
CURIOUS ART: This weekend you can take the Curious art trail around West Norwood cemetery and tonight is the opening party. Free, just turn up, 6-9pm
WORDFEST: Brent’s poet laureate Simon Mole and guests Inua Ellams, John Agard and Warsan Shire perform at Brent Civic Centre for Wembley Wordfest. Free, prebook, 7pm
GYPSY ROMA THEATRE: As part of Gypsy Roma Traveller History month, Hackney Empire hosts Crystal’s Vardo, a children’s play about a young Gypsy girl who runs away from home but has to rely on the help of school children to find her way back. Free, prebook, 7pm
COMEDY: Get idiosyncratic comedy for free at the Camden Head from Sara Pascoe and stand up storyteller Matthew Highton. Free, just turn up, 7.30pm
ROLLER SKATE: The Friday Night skate starts at Wellington Arch. Anyone who feels competent on skates is welcome to join. Free, just turn up, 8pm
END OF THE WORLD PARTY: Encouraging you to dance like there is no tomorrow, The End of the World Party at Village Underground allows partygoers to choose the music as well as pen their deepest desires on the Last Wish Wall. £11, prebook, 10pm
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Good Cause of the Day
Get on your bike this Sunday with a friendly, informal treasure hunt bike ride in north east London in aid of the British Heart Foundation. Grab your friends and make a team or head along solo, for the chance to win great prizes while pedalling around the streets of London. Free (but donations encouraged), just turn up (meet at the petanque field in London Fields park), noon
London Connection Puzzle
The three previous clue words were GOLDIE, GUY and WINNIE. Can you work out the London connection? Today's final clue is JUMBO. No, they're not the names of the Golden Girls, as one reader guessed. The solution will be revealed on Monday.
London Weather, by Inclement Atlee
Did you think we'd made some mistake? Did you believe, even for a second, that there might not be a weather report today? Inclement Atlee would never forsake his forecasting duties. I simply hid today's update behind a textual cloud of concealment, to best reflect the overcast state of London's skies. Well done if you found it — now go and persuade the sun to reveal itself in like manner. (If you're reading this on Kindle, or any other device that strips out formatting, none of this will make any sense. Sorry.)