Agence France-Presse: A visitor arrives on a launch at Raven’s Ait, an island on the river Thames in west London. The idyllic hideaway on London’s famous waterway seems an unlikely setting for an environmental standoff – but that’s what green squatters are staging against a local council that is determined to force them, and their self-proclaimed alternative lifestyle, from the sliver of land. A bucolic, sun-dappled island in the river Thames seems an unlikely setting for an environmental and lifestyle …