Totally Thames is totally brilliant: the Thames Festival Trust is running events on, beside, above and below the river.

Last chance to watch a play outside at the 1930s Regent's Park Open Air Theatre - bring a sweater (until Sept 16)

Another seasonal favourite: Open House opens the doors into rarely-seen or private buildings across the capital from September 6 to 17.

Catch 'The Rosettis' at Tate Britain - with written, spoken and painted contributions from Dante Gabriel, Christian and Lizzie Siddal - before it closes Sept 24.

Lend them your ears: the London Podcast Festival betwitches audiences at King's Place from September 7 to 17.

Quick - the work of abstract sculptor Sir Anthony Caro, who died 10 years ago, is on show at Pitzhanger Manor, Ealing (to Sept 10)

Watch through your fingers as charity competitors abseil 200 ft down City of London building in the Skyscraper Challenge (Sept 9 & 10).

Titosaurus - four times the size of Dippy - stars in the Natural History Museum show on giant dinosaurs, running until Jan 2024.

The Design Museum launches its new show 'Rebel: 30 Years of London Fashion' (September 16 2023 to February 11 2024)

Snap! Astronomy Photographer of the Year - one the capital's most popular annual shows - opens September 16 at the National Maritime Museum, Greenwich.

The V&A launches its first exhibition of the work of the legendary fashion designed Gabrielle 'Coco' Chanel (from September 16).

Bigger splash: the Great River Race, a spectacular 21-mile race from Millwall to Richmond, with competitors at every level.

Dulwich Picture Gallery's show of the work of female Impressionist Berthe Morisot, plus 30+ works by her contemporaries ends this month.

The London Design Festival takes place across London for the week of 16th to 24th September.

Ooh it's time for the annual Frieze Sculpture show in Regent Park: September 20 to 29.

Kenwood House, gloriously sited at the top of Hampstead Heath, hosts philosophy and music festival 'How the Light Gets In' for the weekend of 23 & 24 September.

Baaaa! Watch the annual Sheep Drive crossing Southwark Bridge (from a distance, bridge access is full) at 10 am on 24 September.

The excellent annual Chelsea History Festival takes place in the appropriately historical surroundings of the Royal Hospital Chelsea from 29 September to 2 October.

The highest viewing platform in Europe opens at 22 Bishopsgate from 27 September - pre-booking open now.

A free exhibition at the Imperial War Museum, 'Spies, Lies and Deception' looks at espionage since the First World War opens on September 29.