Climate change protesters have been told to proceed to Trafalgar Square as they continue a cat and mouse game with police, Sky News understands.
Up to 3,000 protesters have been gathering at locations across the capital to demonstrate against Government policy on global warming.
The Climate Camp group has announced it is planning to swoop on a secret location within the M25 and stay there for a week.
It is understood the Red/Purple group have been told move on to Trafalgar Square but is thought this is not where tents will be pitched.
Speculation on the internet, including the Twitter social networking website, suggests protesters are planning to stay in an East London location - possibly City Airport.
he group planned to first gather in six smaller groups to protest at key locations.
Around 100 protesters listened to speeches and music outside mining company Rio Tinto's offices in Aldermanbury Square while they waited for instructions of where to head next.
One camper, Richard Smith, from London, said organisers have chosen the capital as the site of this year's protest because it is an oil and coal city.
"All the carbon-intensive industry in the world is in part controlled from London," he said.
"Before, when we've been on previous climate camps to Drax, Heathrow and Kingsnorth, we've been targeting where the emissions are coming from.
"But the Government turns around and says 'It's OK, we can offset and trade carbon credits and we'll get a great deal at Copenhagen this year'.
"But we've done our research and it's a pack of lies."
A gathering also took place outside Stockwell underground station to mark the death of Jean Charles de Menezes and reports said over 100 met up outside Shell Oil's head offices on South Bank.
Other protest points are the head office of BP in St James' Square, the Bank of England and Stratford Station, near the 2012 Olympic site.
A game of cat and mouse will then ensue as they are directed to the final location by a series of text messages.
Scotland Yard has pleaded with organisers to tell them where they are planning to pitch their tents so they can minimise disruption, look out for their safety and plan how to police it.
But in reply the campaigners made a video which said they just "don't trust police".
Officers will be under immense scrutiny after the G20 protests in which the controversial "kettling" technique was used to contain crowds.
Penknives and "anything which looks remotely nasty" should be left at home, activists have been warned.
The climate camp is in London because they want to highlight the damaging impact of many corporations in the capital and the damage rising temperatures could have - such as flooding from the Thames.
SKY
It has however just been revealed that the target of their week long campaign is in fact Greenwich Park.