Text Santa, ITV's festive appeal to help six charities, culminates tonight with a special appeal show but throughout the day there have been fundraising events.
And stars of West End shows got in the spirit of things this afternoon, by singing Christmas carols in Leicester Square.
Here's our Arts and Entertainment Correspondent Lucrezia Millarini.
More top news
Russell Davy is still haunted by the memory of Eddie Heath, the chief scout he says sexually assaulted him at Charlton.
A leaked letter has caused huge controversy.
Video taken in Soho Square shows sparks flying into the air as the men cut through a lock on the Ducati bike.