Marchers included an anti-capitalist bloc (organised by the North European Anti-capitalist Network) and a Carnival Bloc called by the European Creative Forum, as well as many more groups and individuals from across Europe. I saw people from COBAS (the Italian grassroots union organisation), the CGT (Spanish anarchist union), The Campaign For Human Rights from France (who gave a very tuneful rendition of L'internationale) and a number of other organisations whose flags and banners I didn't recognise; but of course there were many, many participants in the demonstration who I did not see.