CSV Make a Difference Day is the nation's biggest single day of volunteering.
Although most of the events are taking place today (Saturday 27th October), there are also special volunteering initiatives throughout the next week.
In addition to the project in Wembley, Londoners will also be:
- Helping plant spring bulbs and mow lawns on the Thames View Estate in Barking.
- Making over a garden in Wandsworth.
- Creating artworks to display on the wall of a recently-built community garden in Newham.
- Baking cupcakes for elderly people in Camden.
More top news
The Duchess of Cambridge has been driven to St Mary's Hospital in London in the "early stages of labour", Kensington Palace has said.
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.