A schoolgirl whose friend’s death was the first to be blamed on London’s air pollution by a coroner has set up a campaign to tackle the issue in their neighbourhoods.

Ella Adoo-Kissi-Debrah died aged nine in 2013.

She had asthma and lived near the South Circular.

17-year-old Anjali Raman-Middleton set up Choked Up with three teenagers in August to lobby against the pollution that killed her friend.