After an EDL rally in Whitehall was dispersed earlier, supporters of the far-right group are now running through Leicester Square chanting "English till I die" and throwing bottles at police.
Police are holding the protesters in Leicester Square and closing the pubs in which they had been drinking.
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A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.
The Westminster terror attack dominates the front pages of Thursday's newspapers.
A timeline of exactly what happened.