Indeed, next year Brian Haw will celebrate a decade living in a tent in Parliament Square, Westminster. So, ten years of shouting at ministerial cars as they zoomed into the gates of the Houses of Parliament, waving homemade placards, and wearing a floppy hat with badges on it.

Like Stanley Green who spent his life walking up and down Oxford Street with a placard offering LESS PASSION FROM LESS PROTEIN, Brian Haw has become a London institution. He has been joined, off and on, by other protestors. The Tamils arrived in vast numbers, with their own litter patrols and well-behaved children. There’s a nasty Australian women who swears at MPs and their staff through a megaphone. There’s the man claiming that Freemasons killed his friends.

Recently, though, Mr Haw and his eccentric friends have been joined by a vast number of students, unemployed people and people whose jobs allow them inordinate amounts of time off, comprising a ‘democracy village’. Their number includes people who deny that Al Qaeda organised the attacks on 9/11 (which means they think the American government murdered its own citizens). The new arrivals have erected tents, dug latrines, hung banners from the trees and statues, and made it impossible for anyone else to enjoy what was previously public space. Mr Haw is not happy. The Evening Standard reports him saying that he doesn’t want to be ‘lumped together’ with the hippies. ‘I am nothing to do with them,” he said. ‘I’m here to stop torture, genocide and looting of nations.’ By living in a tent for ten years.

I was showing a group of people from Zambia, Nigeria and Ghana around Westminster a fortnight ago. It was a shame they couldn’t see the statue of Nelson Mandela, as they’d requested, because a load of middle-class English hippies have colonised the square.

The UK, and especially London, has always had semi-permanent protest camps. The South African embassy on Trafalgar Square had the City of London Anti-Apartheid Group maintaining a vigil outside during apartheid. Hundreds of women attended, and stayed at the peace camps at Greenham Common and other air force bases during the cold war. Speakers’ Corner has given a platform to ranters and ravers of every hue.

There are many people – Lib Dem MPs and people who write for the New Statesman – for example, think that the ‘democracy village’ must be allowed to continue, perhaps even to grow into a ‘democracy town’ with its own branch of Waitrose. Some agree with the broad aims of the campers: bringing the troops home, an end to wars, and the eradication of Israel. Others defend the fundamental principles of freedom of assembly, and freedom of speech.

No-one, even the Libertarian Alliance, believes that personal freedom should be complete. The freedom to murder your enemies, to hit people who annoy you, to drive your car down the middle of the road at high speed, or to defecate in the street is curtailed by the rule of law. Once you establish the principle that personal freedom has limits, because as RH Tawney famously said ‘freedom for the pike is death for the minnow’, then the debate becomes merely a matter of degree. Freedom is rationed, and distributed, on as fair and wise a basis as possible.

So whose freedoms matter more? Anti-war protestors, or the Londoners and tourists who use Parliament Square for recreation and pleasure? There is surely an irony that liberals are defending people who have removed the liberty of people to walk across a public square by pitching marquees and sinking latrines. It’s got nothing to do with Afghanistan. It’s about whether the law should allow people to live in public parks in semi-permanent structures, or if the laws forbidding it should be enforced.

Beautiful public parks and squares are a precious thing. They are an expression of the egalitarian ideal, and the result of public campaigning. The progressive position is to defend public spaces against encroachment by people with a cause and an account at Milletts. When Boris Johnson sends in the Met to clear the square of protestors, we should be cheering them on, because we are socialists.

Photo: Waqqas 2009