City banks are currently expected to lend the project £4.5 billion, far higher the £2.6 billion originally estimated, and the heightened risk for lenders is likely to see the banks charging more for the cash than originally forecast. Should the terms of the loans become onerous, it is possible that the project could fail value for money tests designed to ensure the Government is spending taxpayers' money efficiently. That could jeopardise this project's financing structure, and could have wide-ranging implications for the future of private sector involvement in public infrastructure.