Once again politics is likely to get in the way of delivering much needed transport infrastructure, efficiently and economically. It is no surprise that costs escalate as governments change and each has to stamp its own mark on the industry. Politicians come and go on a regular basis leaving the professionals who have committed their working life to the industry, to pick up the pieces and take the blame for late delivery and spiraling costs. Do other similar countries to whom we are continually compared suffer the same frustrations. Certainly I am sure France does not despite there political comings and goings.
Comment on: HS2 cost cutting study revealed
As a Civil Engineer one thing that was evident from Crossrail was the importance of aligning the Route wide Railway Systems design with the spatial design of the structures which have to accommodate the vast amount of plant and equipment. I would hope that HS2 will have learned from Crossrail as assumptions had to be made during the design which were identified as risks, some of which manifested themselves down the line.
To correct your article on HS2 Station Architects -- the current Architect on Euston Station is Wilkinson Eyre who was engaged by WSP, the current lead consultant .