As political leaders arrive for the 61st annual Bilderberg conference in London, police have implemented a no-fly zone and used anti-terror laws to close-off streets to traffic. The annual meeting of the secretive Bilderberg Group, which features some of the world's most powerful policymakers and politicians, is a lightning rod for anti-capitalist protestors who see the private club as a conspiracy to fix the global economy" for private interests. The meeting being held at the Grove Hotel in the North London suburb of Watford is being attended by Henry Kissinger, the former U.S. secretary of state, Timothy Geithner, the former U.S. treasury secretary, former Italian Prime Minister Mario Monti and George Osborne, the U.K. finance minister. The heads of Barclays, McKinsey & Company, BP, Goldman Sachs and HSBC will also be in attendance as well as Google's Eric Schmidt and Amazon's Jeff Bezos. Around 200 protesters gathered outside the hotel on Thursday afternoon. A large 7-foot fence had been erected around the hotel building where the group is due to meet. Cars featuring blacked out-windows had been entering the grounds of the hotel, amid protesters shouting "pay your taxes" and "scum". It is predicted the number of protesters will swell as the meeting progresses into the weekend. U.K. opposition politician Michael Meacher travelled to the event to speak at the protest on Thursday, despite his Labour Party colleague and shadow finance minister, Ed Balls, attending the Bilderberg conference. "World elite of finance capitalism meets secretly to fix global economy in own interests," he said on Twitter.