article_snippet: Window is full of anarchist posters denouncing globalisation and the capitalist system .
article_snippet: The Cluttons advert was defaced, while another poster showed the heads of Ed Miliband, Nick Clegg and David Cameron on stakes .
article_snippet: One of the anti-capitalist messages painted on a poster in the window .
article_snippet: Some are here to make a political point, but some are not. '
article_snippet: A protester known as Patrick writes out a sign to be put in the window .
article_snippet: One message simply said 'Have a nice day' in contrast to other more aggressive posters .
article_snippet: Aggressive: Some posters declared 'Class war' and 'The working class strikes back' 'We have a wide range of people here - chefs, caterers, law and politics students, and even an aspiring model - with an age range from about 18 to 60.'
article_snippet: Some of the posters in the window proclaim an apparently violent message - one has a picture of Ed Miliband, David Cameron and Nick Clegg's heads on spike, with the words: 'The only cuts We want to see.'
article_snippet: Defiance: One poster made a reference to the late anti-war protester Brian Haw, who lived in Parliament Square .
article_snippet: A squatter draped in the Irish flag in an apparent homage to St Patrick's Day .
highlights_snippet: Aggressive anti-capitalist slogans are on display in the windows .