UK medical boss Chris Whitty takes on air pollution, urges Brits to challenge idling motorists

• Professor Chris Whitty, England’s chief medical officer, played a key role handling pandemic; his annual report this year says people should scold some drivers
• He targeted those who leave engines running while parked, while those who do that near schools are ‘incredibly antisocial’; dirty air kills up to 38,000 a year, he says