G20 rioters to hang banker effigies from lampposts as city staff are told to wear disguises

* Thousands of City staff told to stay at home next week
* Bankers told not to wear suits and 'dress down'
* Additional 2,500 police deployed at cost of £10million

City workers are being urged to stay at home or to dress down during next week's G20 summit to avoid being targeted by anti-capitalist protesters.

Unprecedented measures are being put in place to prepare for thousands of demonstrators targeting the City and Canary Wharf.

About 3,000 anti-capitalist protesters are expected, with groups next Wednesday marching to the Bank of England, holding 'flashcamps' outside the European Climate Exchange in Bishopsgate, and marching on the US Embassy.