Press Association: Hundreds of eco-activists are expected to join a march to mark the start of a week-long protest against plans to build Britain’s first new coal-fired power station for three decades. More than 200 Camp for Climate Action protesters have already set up camp in a remote field close to the Kingsnorth plant in Kent. The number of protesters at the heavily-policed site in Hoo was expected to more than double by the end of Sunday’s official opening day. The protesters are …