Crossrail, the proposed £16bn Heathrow-to-Essex rail link, has passed its latest value for money review, despite hints from the Conservatives that they could scrap the project if the party forms the next government.
Government officials passed the business plan, believing it provides value for money, at the end of last month. Regular reviews are held into the scheme's financial viability, with the fourth assessment due in December.
Justine Greening, the shadow Local Government minister, shocked the rail industry last week, saying that it was "possible" that, as PM, David Cameron could scrap the link.
The three major parties are outlining ways they would reduce Britain's debt burden. Scrapping Crossrail would help, though it is thought that the Tories are generally supportive of the plan. A source close to Crossrail said: "Justine got caught out by a question. She was a little bit naive."