Climate change activists have launched another day of protest action in London, occupying roads in the city in an effort to stall rush hour traffic.

The protest has been organised by campaign group, Extinction Rebellion, who are calling on the government to change their policies on climate change, and reduce carbon emissions in the UK to "net zero by 2025".

The group gathered at London's Parliament Square at 7am this morning, and will protest throughout the day, forming "swarming road blocks".

'Climate justice'

"what do we want? Climate justice " when do we want it? Now"#ExtinctionRebellion protesters chant at lambeth Bridge roads block pic.twitter.com/AEG7JFaM3o — Damien Gayle (@damiengayle) November 21, 2018

They plan to repeat their protest again tomorrow and on Friday.

Robin Boardman, a member of Extinction Rebellion, said: "First and foremost, we want to sincerely apologise for any disruption caused to members of the public.

"Be prepared for swarms of concerned citizens, who are willing to be arrested, converging throughout the day in central London. Only through daily economic disruption and stopping business as usual, will the government be made to listen. We have informed the police and will of course allow all emergency vehicles to pass.”

'Mass disruption'

Protesters block traffic in London. Image: James Perkins

Last week, the group caused mass disruption in the capital by occupying five bridges in the city, and a source at the scene told talkRADIO they plan to occupy the bridges again today.

The group have previously glued themselves to the government's Department for Business, Energy and Industrial Strategy in an effort to get their message of "rebellion" across, and vandalised the building's doors and windows with graffiti in the shape of their logo.

In their first event in the capital on October 31, the group occupied a major road in the city's Parliament Square area for two hours, and refused to let emergency vehicles pass.