1422 The BBC's Mark Georgiou says: Police horses move to line up outside RBS. Firework thrown
1417 The BBC's Mark Georgiou says: Police in riot gear are slowly clearing the area in front of RBS on Threadneedle Street. It is noisy and the occasional missle is thrown. One protestor has bared his backside to the police. I've not seen any arrests so far. Police seem happy just to contain crowd.
1412 The BBC's Dominic Casciani at Bishopsgate says: Calm here.
Campers are putting up tents and police are not stopping them. Organisers say they will be here for 24 hours and food is being served. Organisers wearing sashes are announcng climate change workshops for anyone here for the long haul.1405 The BBC's Daniel Boettcher says: A dozen or so police officers are putting on riot gear. On this corner of Threadneedle Street some of the protesters have been surging forward trying to push through the police line. The police have blocked off all approaches to the square, they are letting people out but no one back in again.
1352 The BBC's Mark Georgiou texts: More windows broken at RBS - some protestors in building. Mounted police blocking end of Bartholemew lane. More windows broken. Very tense.
1345 BBC correspondents report that windows of a branch of Royal Bank of Scotland in the City have been broken.
1343 Russian President Dmitry Medvedev says he is "optimistic" about future relations with the US after meeting Obama. Obama says he will visit Russia in July.
1342 Rolf Goehler from Ilinois, US, writes: The leaders are too incompetent to address any of these issues. This is a good political show for the dumb masses that think government is the solution.
BBC's Mark Georgiou texts: Bottles and cans thrown at RBS on Threadneedle Street.
1315 BBC reporter Dominic Casciani says:
Climate Camp protesters have occupied Bishopsgate outside the Climate Exchange, where carbon emission permits are traded. Atmosphere is carnival-like among at least 500 people - police are invisible other than vans shielding the exchange offices.1315 BBC reporter Ben Brown outside the Bank of England says: Protesters have been scrawling graffiti on the walls of the Bank. There have been some scuffles in the last few minutes. Some of the demonstrators have been clashing with the police. No large-scale violence but pushing and shoving.
1314 Following Obama's bilateral with Russian President Dmitry Medvedev, they have announced Washington and Moscow will pursue an arms deal cutting nuclear warheads below levels agreed in 2002.
1309 Commander Simon O'Brien from the Metropolitan Police's Gold Command centre says the 3-4,000 people now outside the Bank of England did not tell the police their plans, making decisions about policing levels "very difficult".
1308 BBC diplomatic correspondent Jonathan Marcus says: The world that emerges from this crisis is going to be very different because foreign policy is changed by crisis. There are many people who argue that the impact of this financial crisis is probably going to be greater than the 9/11 attacks in Washington and New York.
Daniel James, Norwich, UK, says:
Why are the BBC talking about the G20 protestors as if they are a bunch of escaped convicts baying for financial blood? My Dad is protesting after finding that his pension is 60% lower than it was 12 months ago. He has worked all his life as a newspaper journalist. 1258 The BBC's Mark Georgiou texts: The crowd outside the Bank of England is getting increasingly tense. The police line in Threadneedle street is becoming the focus of loud attention.
1253 Scotland Yard says the number of people arrested now stands at 11.
1252 BBC producer Dominic Hurst texts: Protesters are penned into the square outside the Bank of England. A police officer said "we've been told not to let anyone out". The
tactics are like the Mayday protest in London's Oxford Street some years ago.
1247 We should point out the G20 summit proper gets under way tomorrow. It lasts four-and-a-half hours. Even given all the pre-G20 legwork by the summit sherpas, it doesn't seem a lot of time to save the world.
The BBC's Mark Georgiou texts: Billy brag. Singing to protestors outside bank.
Jessica Best tweets: Russell Brand spotted among protesters.
1230 City workers have been leaning out of windows to wave £10 notes at G20 protesters on the streets below, the Press Association reports. Demonstrators responded with jeers and shouts, their reporter says.