According to MPs, the Department for Transport has failed to show the High Speed 2 (HS2) is the best way to spend £50bn on the railways.

The House of Commons Public Accounts Committee has released its report into the planning of the project. The report – High Speed 2: A review of early programme preparation – reveals the case has not yet been made for the ambitious programme.

It said: "So far the Department has made decisions based on fragile numbers, out-of-date data and assumptions which do not reflect real life."

It also raises concerns that the target of reaching Royal Assent for the enabling legislation by the end of March 2015 to be unrealistic.

Public Accounts Committee chair Margaret Hodge said: "The Department for Transport has yet to present a convincing strategic case for High Speed 2. It has not yet demonstrated that this is the best way to spend £50 billion on rail investment in these constrained times, and that the improved connectivity will promote growth in the regions rather than sucking even more activity into London. "The pattern so far has been for costs to spiral - from more than £16 billion to £21 billion plus for phase one – and the estimated benefits to dwindle.


"The Department has been making huge spending decisions on the basis of fragile numbers, out-of-data data and assumptions which do not reflect real life, such as assuming business travellers do not work on trains using modern technology.

"As usual with NAO reports, the Department had agreed the facts in the report as accurate before publication. However, as soon as the report was published, the media reported unnamed departmental sources as claiming that it contained errors and was based on out-of date analysis. These claims were quite unfounded.

"The Department has ambitious and, in our view, unrealistic, plans for passing the Bill for High Speed 2. The timetable is much tighter than for either High Speed 1 or Crossrail, despite the fact High Speed 2 is a much larger programme. In my committee's experience, not allowing enough time for preparation undermines projects from the start. A rushed approach contributed to the failure of the InterCity West Coast franchise award."

(JP/MH)