There are few more unmistakable signs that summer has arrived in Britain than hearing the chimes of an icecream van from the street.

But Londoners could soon find it harder to track down soft-serve on a hot day, because of fears that pollutants from the trucks' diesel engines may be endangering lives.

Councils in the city are threatening to clamp down on icecream trucks that roam their streets if they do not become more environmentally friendly.

"No one wants a side order of asthma with their icecream," Caroline Russell, a Green Party member of the London Assembly, said.


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