The high-rise buildings in downtown Bangkok are draped in massive advertising posters featuring Manchester United players, glaring with staged hostility across the elevated highways at equally huge posters of Arsenal and Chelsea players. Traffic is at a standstill. Below the flyovers, the teams’ red, white and blue colours are echoed by the thousands of tricolour Thai national flags furiously waved by yellow-shirted protesters. Thailand is into another round of unrest.

It started, though, as a typically Thai lunch-break protest. Well-dressed office workers were called onto the streets by the "Businessmen for Democracy" movement. At 1.30pm they returned to their desks. But the mood has changed. Now demonstrators are everywhere, blocking roads and invading government ministry buildings. They are increasingly angry - about corruption.