Dozens of protesters have set up camp outside the London Stock Exchange.
Protesters from 'Occupy London' have put up tents at Paternoster Square.
The camp was set up after today's annual May Day march in Central London.
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Calum McSwiggan posted a photo on Instagram as he lay in a hospital bed after the alleged attack.
The London mayor publicly backed defeated candidate Owen Smith in the contest which saw Mr Corbyn re-elected party leader.
Police described it as a "growing sink hole" and it's unclear when the road will reopen.