Things to do
BRILLIANT BOTANICALS: Gunnersbury Park Museum hosts a workshop for children aged 7+, where they can create their own botanical drawing. A botanical artist from Kew Gardens leads the session, and teaches painting and drawing skills based on plants from the park's own gardens. Gunnersbury Park Museum, £15, book ahead, 10am-12.30pm
SUMMER FETE: A coconut shy, lucky dips, splat the rat, name the teddy and a vegetable contest are among the entertainment on offer at the traditional Greenwich Summer Fete. Bake a cake for a chance to be crowned star baker, or ogle other people's creations — all among the usual market stalls. Greenwich Market, free entry, just turn up, 11am-8pm
MOVIE INDUSTRY HISTORY: Babble Talks are lectures on various topics aimed at carers with babies under a year old — although adults without babies are also welcome. Today, hear about the beginnings of the movie industry, from magic lanterns to the silver screen to the birth of Hollywood. East Dulwich Picturehouse, £10, book ahead, 11.30am-12.30pm
TRUTH AFTER MURDER: Set in the year 2099, Camden Fringe show Truth After Murder looks at the devastation left by a fourth world war, and tackles topics of death, murder, morals and society. Etcetera Theatre (Camden), £10, book ahead, 2.30pm (until 25 August)
MARY POPPINS RETURNS: Last year's Mary Poppins sequel is shown in a free, after-work screening next to the canal. Deckchairs and blankets are provided, and food is available to buy from nearby street food traders. Merchant Square (Paddington), free, just turn up, 5.30pm
ANIMALS EAT EACH OTHER: Author Elle Nash discusses her new book, Animals Eat Each Other, with sex educator Ruby Rare. The novel is about a young woman who embarks on a three-way relationship, revealing undercurrents of obsession and jealousy. Ticket includes wine and £4 off the book. Review (Peckham), £5, book ahead, 7pm-9.30pm
ANYTHING GOES: National Youth Music Theatre puts on a production of Anything Goes. Based on the 1934 book by Guy Bolton and P. G. Wodehouse, and using music written by Cole Porter, it tells a classic boy-meets-girl story set on an ocean liner between New York and London. The Other Palace (Victoria), £25-£35, book ahead, 7.30pm (until 21 August)
HIDDEN FIGURES: Katherine Johnson, Dorothy Vaughan and Mary Jackson are the little-known African American women who were on the NASA team that put John Glenn into orbit in 1962. Watch 2016 film Hidden Figures to hear their stories of overcoming gender and race stereotypes. Harris Academy South Norwood, £8.50/£7/£5, book ahead, 7.45pm-10pm
ROCKY HORROR PICTURE SHOW: Do the Time Warp again at Southbank Centre's pedal-powered outdoor cinema. 1975 film The Rocky Horror Picture Show is shown on a large screen — hop on a static bicycle and get pedalling to keep it going. Southbank Centre, free, just turn up, 8.30pm
LIFE DRAWING: Have a go at life drawing at this late night evening of creativity with social enterprise Figuration. Artists of all abilities are welcome, and guidance is available for anyone who's new to it, with all materials provided. The Paxton Centre (Crystal Palace), £10, book ahead, 8.30pm-10.30pm
Tube ponderings with Barry Heck
Our resident tube fancier dishes out daily thoughts on the London Underground.
Today would have been Joe Strummer's 67th birthday. The Clash frontman has an unlikely commemoration in the form of the Joe Strummer underpass next to Edgware Road station. Sadly, or perhaps happily, London's least-loved roundel (pictured), was recently removed from the entrance. Follow Barry on Twitter @HeckTube.
Good cause of the day
Absolutely 80s comes to Wilton's tonight, raising money for cancer care in Imperial College NHS Trust. Dance the night away to a live band performing classic 80s tunes. Find out more and book tickets.