Strikes me this is another money pit with no discernable benefit.
The main man talks like a politician, when asked about the escalating costs he says "we have to square the evolving nature of the project as it goes forward" (that's me paraphrasing).
So what he is saying is that the cost will escalate year on year and become the UK's biggest money pit of all time.
Something else we need to do a u-turn on in my opinion.
...and I bet the taxpayers of Scotland and Wales are paying for it too.