Tributes paid to Nicky Gavron, London clean air visionary and Ken Livingstone's deputy mayor

Sadiq Khan and David Lammy have led tributes to Nicky Gavron, Ken Livingstone’s former deputy mayor who has died aged 82.

Ms Gavron was regarded as a visionary in campaigning for action on London’s poor air quality long before the issue became high profile, and a keen advocate for the congestion charge, Mr Livingstone’s flagship policy that he introduced in 2003.