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During an event in Surrey, the Mayor of London, 46, was challenged by a member of the public to come clean over his plans to make the over populated city's air cleaner. But in his response he has admitted for the first time that the UK's capital will see an influx of as many as another 1.5 million people. More than five million people have moved to Britain in 10 years with immigration figures showing that more than 66 million people live in the country.

GETTY Sidiq Khan has a new London plan and it involves 1.5m more people

You better remember that our population is rising, it is currently 8.5m, by 2020 it will be 9 million by 2030 it will be 10 million Sidiq Khan, Mayor of London

However there are a number of estimates that say the figures are much higher. Mr Khan told hundreds of people in the audience: "Going forward we don't allow London to have worse air than is currently and worse pollution. "And so there is a couple of big things, that I wouldn't mind your input.

GETTY Greenpeace protested about air pollution in London

"One is we are publishing an environment strategy and we need your input into making sure we fulfil my ambition for London to be the greatest city in the world. "You better remember that our population is rising, it is currently 8.5m, by 2020 it will be 9 million by 2030 it will be 10 million. "Actually our city is growing rather than shrinking like Paris we have got to make sure that we are savvy and we are green.

GETTY London is already facing a housing crisis as well as transport issues

"The new London plan is being worked on.” London is currently crippled by a lack of infrastructure while the Government is now paying illegal immigrants up to £2,000 each to go home.

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