Things to do
SCHOOL HOLIDAYS: As the summer holidays enter their final stretch, find a few last-minute fun things to do with our guide to school holidays in London. Get stuck into exhibitions and theatre shows, or go for dinner in a family-friendly restaurant.
THE MONSTER: There's still time to do a lap on the world's largest inflatable obstacle course. The Monster is at Ally Pally until tomorrow, with 40 obstacles dotted over the 300m course including a mega slide. DJs provide the soundtrack, and other activities include drag queen karaoke and boozy bingo. Alexandra Palace, £25, book ahead, until 28 August
SUPREME COURT: See inside the highest court in the land at the Supreme Court's open day. Visit three of the courtrooms and the library, which isn't usually open to the public. Ogle the impressive artworks in the buildings, and hear talks from people who work there. Capacity is limited so get there early to avoid disappointment. UK Supreme Court (Westminster), free, just turn up, 9.30am-4.30pm
ALBERT MEMORIAL: The Albert Memorial in Kensington Gardens is fenced off and usually out of public bounds, but you can get up close to it on this special tour. Learn about how the monument came to be built after Albert's death, and see the details, including the Frieze of Parnassus. Kensington Gardens, £10, book ahead, 10.30am-12pm
YOUNG MAGICIANS: RawMinds is a group of 14-19 year olds who meet regularly to explore science and art. This summer, they've been focusing on magic in sync with the current Smoke and Mirrors exhibition, and today there's a chance to see them performing their tricks and explaining the psychology behind them. Wellcome Collection (Euston), free, just turn up, 1.30pm/2.30pm
REBEL LECTURES: Hear from Freddie Sorensen, one of the founders of Rebel Bingo, about his experiences of founding a business, riding the waves of success, then watching it all come to a halt. His personal story of entrepreneurship also covers mental health, psychology and relationships. The Courtyard Theatre (Hoxton), £9-£15, book ahead, 7pm
QUIZIOKE: Call in your four musical theatre loving friends and form a team for Musical Theatre Quizioke. Sing the answers to quiz questions, take part in a sing along bingo game, and a finish-the-lyrics round. A West End performer gives a little rendition, too. The Other Palace (Victoria), £35 per team (up to five people), book ahead, 7pm
OUTDOOR CINEMA: Night at the Museum is the film being shown on the big screen at Canary Wharf's open air cinema tonight. Take yourself a picnic blanket to sit on, and watch museum exhibits come to life under cover of darkness in the 2006 fantasy film. Canada Square Park (Canary Wharf), free, just turn up, 7pm
WRITERS' SALON: Working on a novel, screenplay, poem or other writing? Head to the London Writers' Salon for an evening of inspiration. Hear from top authors, editors, publishers, journalist and screen writers, and take part in group writing exercises to hone your skills. Dean Street, £24, book ahead, 7pm-9pm (sponsor)
OPERA IN THE CITY: This music festival continues tonight with a multidisciplinary performance featuring violinists, actors and singers. Werther's tragic love story is told through Antonio Vivaldi's violin concerts The Four Seasons. St Bride's (Fleet Street), £18-£26, book ahead, 7.30pm
Tube ponderings with Barry Heck
Our resident tube fancier dishes out daily thoughts on the London Underground.

My Roundel of the Week is really 13 Roundels of the Week, as displayed on this platform clock at Redbridge. Similar timepieces can be seen at Gants Hill and Bethnal Green. Follow Barry on Twitter @HeckTube.
Good cause of the day

Book ahead for Sunday's Refugee Orchestra Project concert at LSO St Luke's. It celebrates the contributions that refugees make to society, and raises money for charity Refugee Action. Find out more and book tickets.
What we're reading
- Mayfair residents fight Annabel's plans to play music on terrace.
- Revealing photos of south London before gentrification arrived.
- A rational look at the benefits of HS2, from IanVisits.
- Has closing Hammersmith Bridge really improved London's air quality?