The police said they had made 1,065 arrests and charged 53 people since the first protests took over a bridge and renowned London intersections such as Piccadilly and Oxford Circus.
The London 2012 canoe slalom champion was carried from the bridge by four officers at 8.30pm shouting about the "ecological crisis".
Sweden's 16-year-old climate change activist Greta Thunberg urged hundreds of climate-change protesters in London to never give up their plight to save the planet.
She added: "Week two marks a new phase of rebellion focused on negotiations where the focus will shift to our actual political demands".
Earlier on Sunday, in what the group later said was an internal memo meant to garner feedback from members, Farhana Yamin, the group's political circle co-ordinator, said they would shift tactics to "focus on political demands".
London Mayor Sadiq Khan also warned Sunday that protests were starting to overstretch the police and limiting their ability to respond to daily crime.
Matt went on to compare the climate activists to the Indian activist Mahatma Gandhi who campaigned against British colonial rule through civil disobedience. We are now facing an existential crisis, the climate crisis and ecological crisis which have never been treated as crises before.
Greta Thunberg speaking in London.
'But we will make sure that they will not get away with it any longer'.
But at Marble Arch, activists will meet to "vision what's going to happen in the coming week", an Extinction Rebellion member said.
He said: "We can not yet at the moment, as individuals and as companies, be trusted to take care of the environment".
'How do we want the future living conditions for all living species to be like?
They will also set up a political taskforce to take forward public negotiations with the Government, warning that they are prepared to scale up action depending on how much progress is made.
He said: "I share the passion about tackling climate change and support the democratic right to peaceful and lawful protest".