Yes, he will talk of grave mismanagement, saving money and maybe reshaping the project – but it will get the green light. He has been influenced by the Treasury recognition that, given the sunk costs, there is no cheaper way of creating vital extra north-south rail capacity.
But Willy, the entire point of the very concept of sunk costs is that they’re not an influence upon current decision making. Because they’re sunk, d’ye see? Whatever we do they’ve been spent already, we can’t get them back. Thus whatever the decision now about the future they’re irrelevant.
Plus, of course, we don’t need more north south passenger (freight being a different matter and freight not needing that speed) capacity because the internet, 5G, autonomous cars and working from home are all going to cut rail travel rather than increase it.