From Wandsworth to Camden, hundreds of people have set to work in their local communities to mark Make A Difference Day.
Many have been inspired by the example set by London's 70-thousand Olympic Gamesmakers.
Piers Hopkirk has the story.
After the massive success of the volunteer force at this year's Olympics, CSV is encouraging other Londoners to get involved.
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.
Hundreds of volunteers across London are taking action today, to give something back to their local communities, on CSV Make a Difference Day.
These volunteers in Wembley have been helping to spruce up Brent River Park, planting daffodil bulbs and cleaning out the river.
London's Olympic Ambassadors are back on the streets in a pilot project at St Pancras Station.
The volunteer force will offer advice to visitors on how to get to attractions, restaurants and shopping areas.
But, as Rags Martel reports, they started with something a bit more dramatic.
During the Olympics, 8,000 Team London volunteers were deployed across the city, in major transport hubs and tourist hotspots, to welcome visitors to London.
Now, Boris Johnson hopes to build on the success of that programme, by using volunteers "as an additional resource for large scale events".
Today, the first pilot scheme begins at St Pancras Station, with Team London Ambassadors providing a warm welcome to international visitors arriving on the Eurostar.
This will be followed by a series of other projects, which will see ambassadors:
helping tourists arriving at events at the 02 arena in Greenwich.
welcoming visitors during busy periods at Gatwick Airport.
selling poppies to raise money for the Royal British Legion.
at Saracens Rugby Club home games when the team returns to London in the New Year.
The Mayor's Senior Advisor for Volunteering, Charities and Sponsorship, Veronica Wadley, said: