The cost of installing a roof on the Olympic Stadium has shot up by nearly £36 million.

The total budget for installing what will be the world’s largest cantilever roof now stands at just under £190 million, it was revealed on Wednesday.

The London Legacy Development Corporation (LLDC), which manages Queen Elizabeth Olympic Park, said the additional funding awarded to contractors Balfour Beatty was towards strengthening the roof’s supporting truss.

A spokesman for the LLDC said project contingencies and additional income generated from our other developments would cover the rising costs.

He added: “This is a unique two year transformation project and a hugely complex engineering scheme, using techniques previously employed on oil rigs.

“Providing adequate support for the new roof has required significantly more strengthening work to the main roof truss, which was originally designed to be taken down after the Games.

“We have therefore today agreed to increase the value of the Balfour Beatty contract by £35.9m to £189.9m.”

The transformation project will have taken two years once complete for the Rugby World Cup next year. West Ham United Football Club will call the stadium home from 2016.

A new community athletics track will also be created next to the main stadium, funded by the London Marathon Trust.