The Radiohead frontman Thom Yorke is the latest big name to lend his support to protesters who have been camping outside St Paul's Cathedral.
The singer played a DJ set to "thank" the Occupy London activists who have been protesting against cuts, saying ordinary people should not pay for the financial crisis.
Yorke join DJ 3D of Massive Attack to perform to about 100 people at the secret gig in the basement of the "Bank of Ideas", an abandoned office block in Hackney, east London, owned by the Swiss bank UBS. Posters with slogans such as "Save our squatters" and "Big Sister is watching you" adorned the walls of the room, which was decorated to look like an office Christmas party. Neither musician spoke to the audience, but clapped the crowd as they applauded at the end of the 90-minute set.
Campaigners have camped in the courtyard of St Paul's since 15 October. They also occupy Finsbury Square in Islington, north London, as well as the building where last night's event was held. Playwright Alan Bennett and designer Vivienne Westwood have visited them at St Paul's.