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BLOOD: Today’s opportunities to donate blood are at St Olave Parish Hall in Fenchurch Street, Sainsbury's Car Park, Dog Kennel Hill and the usual donor centres. See site for terms and conditions.
PARLIAMENT: Londonist readers get 20% off midweek guided or audio tours around the Houses of Parliament during party conference season. Book tickets online through Ticketmaster, in person at the box office or by phone on 0844 847 1672 using promo code LMIDD20
LONDON DESIGN FESTIVAL: London’s celebration of design in all its forms is happening all over the capital. There are plenty of events to choose from, most are free: we’ve selected the top things to do during the festival. You can also browse one of these design-themed exhibitions connected to it. Until 21 September
RIVER WALK: Starting from Myddelton House Gardens in Enfield, garden volunteer Peter Baker leads you through the Forty Hall Estate and Whitewebbs. £3.50, to prebook call 08456 770 600, 10am-1pm
FREE WALK: During this month's Mayfair Market, join tour guide Yannick Pucci for a free walk around Brown Hart Gardens and enjoy a 10% discount on all hot food purchases. Meeting Point for the walk will be by the entrance of the Garden Café at the top of Brown Hart Gardens. Free, just turn up, 12pm and 1pm
PASTA MASTERCLASS: Learn the art of making pasta from Italian chefs Giovanni and Antonella Rana. This masterclass takes place at their restaurant in Regent's Place, your ticket includes a two-course meal and a glass of Prosecco. £25, prebook, 3pm
SCIENCE IN A PUB: PubSci presents UCL researcher Dr Paul Hellier who talks about fuels of the future. The event takes place at the Old King’s Head pub in London Bridge. Free, just turn up, from 6pm
FREE TALK: Jon Cunliffe, leader of International Medical Corps UK, talks about his experience of working in difficult areas across the globe. The event takes place at Brunei Gallery Lecture Theatre, close to Russell Square. Free, prebook, 6pm
MEET THE MAKERS: Somerset House hosts a group discussion that involves a diverse set of makers, whose practice spans a range of production and manufacturing methods. The talk focuses on different types of design. £6+bf, prebook, 7pm
THE SHARD: Engineers Roma Agrawal and Leo Hollis discuss the future of London and the rise of skyscrapers and tall buildings in the capital. The talk takes place at the top of the Shard, of course. £35+bf, prebook, 7pm
OLD STUFF: Hackney's Look Mum No Hands bar hosts a party that celebrates beloved (and old) households. Bring along your favourite vintage piece — it needs to be at least 10 years old — then celebrate it, or get it fixed. Free, prebook, 7pm
LIVE MUSIC: Head to Rich Mix in Shoreditch for an evening of free music. The Trans-Siberian March Band performs live along with The Flying Seagull Project. Free, just turn up, from 7.30pm
OUTDOOR OPERA: Trafalgar Square hosts a screening of Rigoletto, live from the Royal Opera House. Free, just turn up, 7.30pm
Find more London events in our Free & Cheap events listings. Want to see your event in these last-minute listings? Email us at firstname.lastname@example.org 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.
Londonist is proud media partner to Totally Thames, the river-based festival taking place throughout September. Each weekend, we’ll be bringing you our pick of Totally Thames events taking place on Saturday and Sunday. See individual events for prices and other information.
LONDONIST AFLOAT: Not got your tickets for Londonist’s very own river-based adventures yet? What’s stopping you? We’re running a series of talks covering every thing from river-based trivia. Members of Team Londonist will be onboard all weekend and we’d love to meet you. Tickets are £7.50 each, but if you’re having trouble choosing which events to go to (and who could blame you?) we’re offering day passes for £15. Go on, get your tickets here. 20-21 September
Good Cause of the Day
Sign up now for a charity run on Thursday 18 September in Regent's Park. Beat the Sunset aims to fundraise in aid of The Prince’s Trust, a charity which helps to support over 58,000 young disadvantaged people a year in the UK. You can both participate as an individual or a team, more information on the website. £19, prebook, 7pm
From the Archive
From our series of alternative tours of London: enjoy a ramble round Dulwich.