Jamie Oliver will cook for the G20 leaders on the day his wife is expected to give birth to their third child.

The celeb chef will have to hand over his mobile phone for security reasons when he goes into number 10 Downing Street this week, where Barack Obama is one of the world leaders who will join Gordon Brown at the dinner.

But Downing Street officials have been asked to keep Jamie informed if his wife, Jools, goes into labour.

The chef – who has two daughters with Jools, Poppy Honey, seven, and Daisy Boo, five – describes cooking for the event as ‘a pretty cool gig’ in his online diary and writes he is ‘hugely excited’ about it.

Although the menu is under wraps until the day itself, he promised to take “the chance to show off some really incredible British ingredients”.

A group of apprentices and recent graduates from his chain of Fifteen restaurants will be helping him on the night.

The first Fifteen restaurant, which was set up to give disadvantaged youngsters a chance to learn a trade, opened in London in 2002 and was the subject of television series Jamie’s Kitchen.

Since then, three more restaurants have opened in Amsterdam, Cornwall and Melbourne.

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