Speaking at a press conference nine days before the opening of the Games, Robertson reiterates that Games venues have been delivered on time and under their 9.3-billion-pounds public funding, which was originally set at 2.4 billion in 2005.
"The Olympic Park has been delivered on time and within budget. We are able to report that we have 476 million (pounds) of uncommitted contingency remaining. And we believe that leaves us in a very strong position."
But that doesn't mean there are no challenges.
UK-based G4S, the Games' security contractor, admitted only last week it could not provide the ten thousand plus security staff as promised. And the government had to deploy an extra 3,500 soldiers to cover. A further 2,000 are reportedly being kept in reserve as a contingency in case there are further issues.
Despite the questions surrounding G4S and its security management, Robertson shows confidence in the company and its CEO Nick Buckles' ability to make things right.
"We're absolutely clear that firstly we're not going to spend a penny more of taxpayers' money on the security of the Games. Secondly, we're absolutely in the process at the moment of activating necessary penalty clauses in the contract. What's crucial now is he and his organization concentrate absolutely on delivering a safe and secure Olympics and I have confidence in their ability to do so."
As for the remaining contingency, it's currently held in the treasury and what will happen with the money after the Games will be decided then.
For CRI, I'm Tu Yun reporting from London.
