Samantha Cameron plans royal wedding street party

Samantha has applied for a licence to throw such a party and it raises the prospect of the nation's most famous street being decked out in bunting and lined with trestle tables like thousands of roads up and down the country, according to The Sunday Times.

Downing Street has refused to disclose who may be invited to the party but it is thought that No 10 staff and their families will attend. They could be joined by dignitaries and foreign ambassadors for whom the Camerons are also holding a reception.

Like other party organisers, the prime minister's wife has had to apply to the local council, in her case Westminster.

"We don't expect there will be a problem with issuing permission, seeing as it is a cul-de-sac," said Martin Low, city commissioner of transport for Westminster council.

Unlike most other such street parties, the Camerons' event will be held behind locked security gates, which were installed in Downing Street during Margaret Thatcher's premiership due to fears of IRA bombings.

Up to two million people in Britain will attend street parties to celebrate the royal wedding.

In the morning, the prime minister and his wife will attend Kate and William's wedding at Westminster Abbey. George Osborne, the chancellor, who lives at 11 Downing Street, is also on the guest list at the abbey, as are the cabinet ministers Jeremy Hunt, the culture secretary, and Theresa May, the Home Secretary.

The Camerons will also attend a lunchtime reception hosted by the Queen at Buckingham palace.