Impromptu protests largely lead by pro-Remain campaigners broke out across the UK following the announcement under the banner of ‘stop the coup’, with larger-scale action almost immediately scheduled for today.
Anti-Brexit campaign group Another Europe Is Possible has organised 32 #StopTheCoup demonstrations to take place in England, Scotland and Wales.
Eyewitnesses have described crowds of several thousand marching through cities such as London, Bristol, and Manchester.
Meanwhile, left-wing group Momentum is calling on its members to “occupy bridges and blockade roads” in conjunction with the protests.
As the speeches finished on Whitehall just before 2pm, a number of protesters shouting “stop the coup” and “our democracy and Parliament is under attack” blocked Westminster Bridge – bringing the River Thames crossing to a standstill.