Environmental protesters block access to Parliament Square

Demonstration organised by Extinction Rebellion aims to highlight government failure on the environmentDozens of environmental campaigners blocked the roads around Parliament Square to highlight concerns about the environment on Saturday.About 50 activists from Extinction Rebellion, a direct action group that has been coordinating a campaign of civil disobedience which has brought areas of the capital to a standstill in recent weeks, risked arrest by standing defiantly in roads in front of queue