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Ms Constance added: "As we continue to see a period of warm and dry weather, it's essential that all of us act responsibly while enjoying the outdoors so we can keep the number of wildfires at an absolute minimum."

"Experience shows that tech platforms do the absolute minimum necessary to comply with the law and little more. In the current climate, this is unlikely to change," she said.

Neil Garratt, leader of City Hall Conservatives said: “Last year the mayor said that £500m was the absolute minimum to stop TfL collapsing, but this year he claims that anything ‘north of £250m’ is a win.”

One restaurant in Notting Hill, Dorian, increased its corkage charge to £100 - plus the cost of another bottle from its 25-page wine list, where prices range from £50 to £5,895, so an absolute minimum of £150.

She added that the budget will "drive economic growth, deliver on a programme of capital investment and keep the burden on our ratepayers to an absolute minimum."