Masked protesters fire fireworks at the Houses of Parliament Scotland Yard said that as of around midnight 10 people were detained, including three on suspicion of assaulting police officers, one of a firework offence, three for public order crimes and one of attempted GBH. The high-profile police presence saw Parliament Square barricaded with wire fences and in lock-down as protesters attempted to penetrate the circle of steel. Wearing white Guy Fawkes masks, they fired fireworks at the Houses of Parliament as police helicopters circled above. As Big Ben chimed 7pm, protesters attempted to throw more fireworks and set off loud rockets. Protesters walked to Buckingham Palace where fireworks were thrown at the feet of police officers guarding the palace gates. More rockets were fired at the statute opposite and into the crowds. A number of arrests were made as protesters made their way to the palace. The Metropolitan Police said that as of around midnight 10 people were detained (Reuters) A statement on the Anonymous website said the group would have "bigger banners, louder voices, more people and a louder system." Steve Foster, a 36-year-old storeman from Liverpool, came to the capital to attend the event and make his voice heard. He said: "I think everyone wants it to go peacefully really, just a peaceful demonstration. More and more people have been turning up every year so hopefully it will keep growing and growing until there will be change. There is one solution, revolution. Russell Brand was spotted among protesters outside the Houses of Parliament, just as he was last year (AFP/Getty) In a statement, the Metropolitan Police said they had attempted to contact organisers of the event "without success." And it added that they imposed Section 60AA of the Criminal Justice and Public Order Act 1994 across Westminster, providing powers to remove masks when police feared a crime would be committed. Chief Superintendent Pippa Mills, the Met Police spokesperson for the event, said: "Police officers worked under challenging conditions. Despite numerous attempts, the organisers refused to engage with us. Our policing operation and work with our partners ensured that on the whole the event passed off without major incident. Anonymous says it was protesting against austerity, infringement of rights and mass surveillance.