Greenshirts in Balcombe have blocked the main London road past the site and have won themselves a Section 14 order, under the Public Order Act 1986. This basically tells protestors where and when they are allowed to assemble, the conditions on the order's use being essentially that the protest is causing a disruption to the law-abiding section of society.
This means they have to get off the road or face fines and/or imprisonment, although by the looks of it, not nearly long or large enough, respectively.