A new report says it could jump by £30bn over its present £56bn taking it to almost the £100bn many of us predicted. The new cost is almost three times the original when it was first mooted and it will inevitably rise further.
Even if we were living in times of plenty the costs cannot be justified. And in the UK the distances between our major cities, something like an average of 125 miles, mean that very little time savings can be made between them.
We would be better off creating an upgraded inter-city network between major and other cities with decent trains running between them - something the whole of the country could benefit from.