LONDON, UNITED KINGDOM - NOVEMBER 05: A firework, fired by a protester, explodes near Victoria Memorial and Buckingham Palace during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Riot police protecting Buckingham Palace during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: A firework, fired by a protester, hits Victoria Memorial outside Buckingham Palace during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: A firework, fired by a protester, explodes on top of Buckingham Palace during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous outside Buckingham Palace in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Riot police protecting House of Parliament during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Two masked protesters hiding behind a police van which is being vandalised during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous outside Buckingham Palace in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters clashing with police during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous at Traflagar Square in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters clashing with police during the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.

LONDON, UNITED KINGDOM - NOVEMBER 05: Masked protesters taking part at the 'Million Mask March' demonstration organised by activists Anonymous in London, England on November 5, 2014. The event has become associated with protesters donning the Guy Fawkes mask made famous by graphic novel and film of 'V for Vendetta' and now used around the world as a symbol of anarchy.