An announcement is expected later this week that Scottish Government are to pay an extra £60 million and Glasgow Council £10 million to help balance the book.

 

It is not clear whether the remaining £10 million will come from.

 

Originally, £373 million was budgeted for the Games, with 80 per cent supplied by the Government and 20 per cent by the Council.

 

But organisers claim that economic circumstances have changed dramatically since the figures were first compiled in 2006.

 

It is thought as much as half of the extra funding will be used to support the transmission of high-definition television (HDTV) as the global recession has cut the value of television rights.

 

Gordon Arthur, a spokesman for Glasgow 2014, admitted that officials have been studying their projections for the Games.

 

He said: "The world has changed quite a lot since 2006: the economic climate, the legislative climate, changes over time affecting different aspects of the costs of staging the Games."

 

Organisers have been looking in detail at costs such as the conversion of Hampden Park for athletics events and of televising the event.

 

Arthur said: "It is a fact that over recent times the cost of putting on TV coverage has gone up because of things like HDTV and the technology that goes with watching sport on TV.

 

"In the current economic climate, the value of broadcast rights is not what it was."

 

Games organisers are in talks with the BBC over whether it will act as both host broadcaster and UK broadcaster.

 

The 1986 Commonwealth Games in Edinburgh were also beset by financial problems.

 

It eventually racked up a deficit of £4.3 million on a budget of £14 million.

 

A spokeswoman for the Scottish Government said: "The 2014 organising committee has commissioned a budget review.

 

"The outcome will be announced in due course and the Scottish Government and our Games partners will respond at that time."