Teenage climate change activist Greta Thunberg has told Extinction Rebellion protesters in London that "for way too long politicians have got away with not doing anything at all to fight the climate crisis."

Addressing thousands of people from the stage at a protest site in Marble Arch last night (April 21), the Swedish teenager warned: "We will make sure they will not get away with it any longer."

"We will never stop fighting for this planet and for ourselves, our future and the future of our children and grandchildren," she added, to applause.

A total of 963 people had been arrested as of Sunday evening while 40 have been charged in connection with the weeklong-running protests, local media reported, citing the Met Police.