In Video: Mayor gets muddy helping tree-planting campaign

Mayor of London Sadiq Khan has joined 15,000 volunteers across London to plant 80,000 trees.

The mass tree-planting weekend, with more than 30 events across the capital, aims to help it become the world’s first National Park City.

As well as 75,000 trees planted on public land, the mayor has offered Londoners 5,000 trees for their home gardens.