Supporters of the online action group Anonymous have taken to the streets of London to show their support for the organisation.
Hundreds of people have gathered in Trafalgar Square and have marched on parliament wearing masks of Guy Fawkes.
The protesters say they are taking part in the Million Mask March which has seen similar demonstrations in America, Australia and Scandinavia.
Anonymous claim the protest is demonstration of support for their organisation and WikiLeaks.
More top news
Scientists believe they may have found the key to fighting HIV - and it rests in the immune system of llamas.
The United Nations has made a renewed and record-breaking global appeal, after falling well short of its last request for financial help.
It used to be the most important club on the northern variety circuit, but since Bernard Manning's death the club no longer draws the crowds