Tills ‘to ring up £13bn windfall’ from Games

The estimated figure is significantly more than the £9.3 billion budget for staging the Games and is made up of £6 billion from foreign direct investment, up to £4 billion in high-value contract opportunities, £2.3 billion from extra tourism and £1 billion from additional sales by UK companies, said Downing Street.

Visiting Team GB’s preparation camp in Loughborough, Leicestershire, Mr Cameron said he wanted to see Britain break records not only on the track but also in the legacy and inspiration which the Games provide for the future.

“This summer is going to be about a magnificent sporting event,” said the Prime Minister. “We’ll be celebrating the medals, the heroes and the heroines. It will be inspirational. We must make sure these are the inspirational games.

“But to really make the most of them we have got to make sure this inspiration is more than a one-off, one-summer wonder.

“There is an opportunity to regenerate communities. To bring people together as volunteers. To revive school sport. And to bring prosperity and jobs to this country.

“These are Britain’s games, Britain’s opportunity and Britain’s moment. We’ve got to make the most of them – and we will.”

Mr Cameron said he would devote his energy over the Olympic period to drumming up business on the back of the global event, which will give the Government a chance to sell Britain to the world.

Over the summer the Government will host a global investment conference and 17 global business summits at Lancaster House, which will bring together British businesses with potential investors and trading partners.

He said: “I am confident that we can derive over £13 billion benefit to the UK economy over the next four years as a result of hosting the Games.

“I am certain that when you add in the benefits from construction the total gain will be even greater.”