London is bracing itself for more unrest today after a day of anti-capitalist demonstrations yesterday. Police have vowed to crack down on violent protesters, after angry scenes continued well into Wednesday night.Four separate marches converged after starting off from around the city earlier in the day, but the banks and the financial industry were the main focus of the anger. Some protesters set fire to an effigy of a banker hanging from a lamp post. Police responded with several baton charges and officials say at least 30 people were arrested. Others appeared to have been injured, including one police officer. One man was also found dead near the Bank of England, possibly from an unrelated medical condition, according to the authorities. The plight of the Palestinians was highlighted by the Stop the War Coalition, with a gathering outside the US embassy and a march to Trafalger Square. Further demonstrations are expected to be held this morning, ahead of the G20 summit itself.