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 spokesperson criticised the behaviour of a "small number" of fans at the game between Birmingham City and the Wolverhampton Wanderers.
Those taking part in the bizarre trend say the combination of fruit juices and hot water makes for a uniquely liberating experience.