• The London Transport Museum Depot’s ‘Open Weekend’ kicks off on Saturday. The weekend of events at the depot in Gunnersbury Lane, Acton, will feature model railways, the chance to ride the Acton Miniature Railway – on either a replica 1938 tube train or a Metropolitan steam train – as well as heritage buses, and talks by author and broadcaster Christian Wolmar on his books Engines of War and Subterranean Railway. There will also be events specifically for children. The depot is home to more than 370,000 objects including road and rail vehicles, posters and artwork, and ticket machines. Events run from 11am to 5pm (last entry 4pm). There is an admission charge. For more information, see www.ltmuseum.co.uk/whats-on/museum-depot/events

• Brixton Windmill, the only surviving windmill in inner London, will be open to the public from 2nd May after a major restoration project. The Grade II* listed building, located in Windmill Gardens in Brixton, south-east London, was built in 1816 and was owned by the Ashby family until it ceased production in 1934. It was purchased by the London County Council in 1957 but had since fallen into disrepair. The restoration project, which kicked off in October last year, was partly funded by a £397,700 Heritage Lottery Fund grant obtained by Friends of Windmill Gardens and Lambeth Council. It is envisaged that interpretation materials will be installed and a programme of educational activities run at the site – including growing wheat and mixing flour – after the completion of the restoration work. See www.brixtonwindmill.org for more information.

• Giant Olympic Rings were unveiled at St Pancras International earlier this month. The 20 metre wide and nine metre high rings, which have been suspended from the station’s roof, weigh 2,300 kilograms and are made from aluminium. Built in Hertfordshire over four weeks, they took seven nights to install. They’re the first in a series of Olympic Rings that will appear around the city in the lead-up to the 2012 Games. The Olympics was last held in London in 1948.