Cost of Olympic Games rises yet again

The Olympic Games could go over the �9.3bn budget unless action is taken to curb costs, the National Audit Office has warned.

It said a doubling in estimated security costs meant there was risk that more taxpayer funding would be needed.

Yesterday, the government revealed an extra �271m was needed for security guards.

But Government ministers say over n �500m remains in unallocated funds for dealing with any further contingencies.

More on this story later.