Guardian: Demonstrators converging on the G20 summit this evening began taking over squats on the border of London’s Square Mile to use as bases from which to launch a series of co-ordinated “direct action” protests. The occupation of four buildings prompted the first confrontations with police, and marked the start of two days in which officers are expected to play cat and mouse with protesters determined to bring the financial heart of the capital to a standstill. Protests are expected …