The march is thought to have been the biggest public demonstration in the General Election run-up and shows the strength of public opinion on the need for stronger political action to tackle the nature and climate crisis.
Celebrities at the march included Emma Thompson, Liz Bonnin, Chris Packham, Dr Amir Khan, Feargal Sharkey, Steve Backshall, Megan McCubbin, Dale Vince and Mya-Rose Craig.