Demand for Olympics tickets at London 2012 could easily outstrip supply with one in five adults in the UK claiming they plan to buy tickets for the Games, a new survey published today has discovered.

But while 70 per cent of people polled believe the Olympic Games will boost the UK economy, only 39 per cent believe this will outweigh the cost of hosting the spectacle.

Organisers are releasing 6.6 million tickets to spectators in Britain, with a deadline of April 26 for applications to join the ballot.

Outdoor advertising agency Kinetic Worldwide said the Games could be "massively over-subscribed", with 10 million Britons saying they plan to apply for tickets.

A further 2.2 million tickets will be available to overseas spectators and organisations sponsoring the Games.

In the capital, 36 per cent of people say they plan to buy tickets, with just 23 per cent saying tickets are too expensive.

Organisers say one quarter of tickets will cost less than £25 ($40) and 90 per cent will cost less than £100 ($161).

The best seats at the Opening Ceremony will cost £2,012 ($3,243).

More than half of Londoners say they are now excited about the Olympics, up 10 per cent since October to 51 per cent.

Across the UK 40 per cent of those surveyed said they are excited.

More than half of those planning to go to the Olympics say they are not sports fans but consider it to be a "once in a lifetime" experience.

James Copley, of Kinetic UK, said: "Our research suggests the level of anticipation and interest in attending the Games is growing and London will see a surge in visitors at the top end of expectations."

Kinetic Worldwide surveys a panel of 500 UK adults every quarter.