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BLOOD: Today’s opportunities to donate blood are at Conway Hall in Holborn, Stoll in Fulham and Sainsbury's in Sydenham. See site for terms and conditions.
LONDON EXHIBITION: Today is the last chance to see Rambling about London, an exhibition of illustrations by Mike Graves, at Barbican Library. Free, just turn up, 9.30am-5.30pm
TOWER BRIDGE: Visit the Tower Bridge Exhibition for just £1.20 today as the landmark river crossing celebrates its 120th anniversary. More information here. £1.20, just turn up, all day. Today is also the last chance to catch the Tower Bridge: A Celebration of 120 Years exhibition at Guildhall Library. Free, turn up, last day
PORTRAIT EXHIBITION: The Society of Antiquaries, located at Burlington House in Piccadilly, opens a new exhibition today. It’s a collection of paintings including portraits of 18th-century antiquaries and rare 15th- and 16th-century portraits of medieval and Tudor monarchs and rulers of early modern Europe. Free, just turn up, until 1 August
WORLD WAR ONE READING: As part of the Waterloo Festival 2014, there is a reading of poetry, letters and memoirs from World War One. Includes work by Rupert Brooke, Rudyard Kipling, Jessie Pope, Wilfred Owen and Edith Nesbit. £5/£4, prebook, 3.30pm
MUSIC EDUCATION DEBATE: Head to the London Symphony Orchestra’s St Luke’s venue on Old Street for this debate about why every child needs music, and whether the curriculum has the right balance between science and arts. Free, prebook, 6.30pm
ST PAUL'S SECRETS: Historian and public intellectual Lisa Jardine discusses the Secrets of St Paul’s Cathedral with writer and broadcaster Patrick Wright at the Royal Academy on Piccadilly. £14/£7, prebook, 6.30pm
UNDERGROUND PHOTOS: At Rich Mix in Shoreditch, Bob Mazzer launches his book of Underground photographs. The pictures date from the 1970s and catch a series of individual moments on the Tube, and he will be talking about them. Free, prebooking essential, 7pm
ITALIAN WAYS: Tim Parks’ new book captures the essence of Italian life and looks at how Italians view themselves, with specific reference to the Italian railways. He is at Daunt Books in Marylebone to discuss the book. £8, prebook, 7pm
LADIES CABARET: Head to The Crazy Coqs Cabaret & Jazz Club near Piccadilly Circus for a musical cabaret show by Ladies Go-Diva, consisting of songwriter/performer Helen Goldwyn and sidekicks Katherine Mount and Lisa Peace. £15, prebook, 8pm
RED IMP COMEDY: Winner of the 2010 Edinburgh Comedy Award Russell Kane is at Ye Olde Rose and Crown in Walthamstow to preview this year's Edinburgh show. Also performing is fellow comedian Susan Murray. £12, prebook, 8.30pm
Find more London events in our Free & Cheap events listings. Want to see your event in these last-minute listings? Email us at email@example.com at least 48 hours before the event, and we will consider it for inclusion. Note, due to high volumes of email, we can’t always reply.
Good Cause of the Day
Today is the start of Action For Kids' Beach Volleyball Tournament at Canary Wharf. Until 18 July, teams will compete against each other while raising money for Action For Kids. Enter a team of 5-12 people in the tournament for a registration fee of £250, or go down and show your support for free.
London Connection Puzzle
Congratulations to Charlene Concepcion, who was first (of many) to guess the solution to last week's puzzle. THOR, ODIN, CEDRIC and HARDEY are all names of Tower of London ravens. A new puzzle, set by Charlene, starts tomorrow.
From the Archive
Ever wondered what the abandoned Aldwych Tube Station would look like as a swimming pool? Or the BT Tower, if it were brought back into public use? Wonder no more with these images of London's forgot spaces, reimagined.