A further £19M is to be spent on Olympic Park venues to make them better able to cope with explosions.
Ministers have approved the extra cash to make venues for the London 2012 Olympics more blast resilient, the Department for Culture, Media and Sport (DCMS) said.
It was released in the past three months from the Funders Contingency, used to cover risks outside the control of the Olympic Delivery Authority (ODA), which covers build and infrastructure for the Games.
Funding for resilience measures is only allocated after decisions are made using the latest advice from the security services.
In its quarterly economic report on the budget for the £9.3bn Olympic project, the DCMS said the improvements were “predominantly hardening modifications to existing structures” and had not increased the expected security spend.
The credit crunch has forced organisers to dip into the contingency, of which almost £1.3bn remains from the near £2bn available.