Andrew Steele wrote in the Guardian:
In among a raft of new infrastructure spending announced by the UK government in the wake of last week's spending review, it was revealed that the cost estimates for the HS2 high-speed train line had been revised significantly upward. According to the new projections, HS2 will be completed in 2033 at a total cost of £42.6bn for construction and £7.5bn for trains – a total of just over £50bn.
What is immediately striking about this figure is that it's about the same as estimates of how much it will cost to develop nuclear fusion to the point at which it could supply affordable electricity to the grid.
What is also strikingly missing is that the £50 billion for HS2 is being paid by the British taxpayer, whereas the $50 billion estimated for fusion could be shared by all the countries in the world. That makes it much more affordable.
However, in general Steele gets the point. Good for him!