High-Speed 2 rail link questioned by National Audit Office

16th May 2013
High-Speed 2 rail link questioned by National Audit Office

In an early examination of progress by the department for transport in planning for the High Speed 2 rail network, the National Audit Office has expressed reservations about the Department’s business case.

In particular, in presenting its case for investment in the project, the department is said to have poorly articulated the strategic need for a transformation in rail capacity and how High Speed 2 will help generate regional economic growth.

According to a report from the office, released today, the Department’s methodology for appraising the project puts a high emphasis on journey-time savings, from faster and more reliable journeys.

However, the relationship between these savings and the strategic reasons for doing the project, such as rebalancing regional economies, is unclear.

It is also unclear to the NAO whether the business case covers just the route between London and the West Midlands (phase one, due to open in 2026) or the full Y-shaped network with lines from Birmingham to Manchester and Leeds respectively (phase two, due to open in 2032).

The Y-network has a stronger economic case but this is much less certain as route designs are less well-developed, the NAO said.

The benefit-cost ratio calculated for phase one has twice contained errors and the department has been slow to carry out its own assurance of the underlying analysis, said the report.

The NAO’s opinion is that the department and its advisers HS2 Limited should update the data underpinning some key assumptions in the ratio.

The report notes that the estimated cost of phase one will change as costs become firmer.

In some documents, the estimated cost is between £15.4 billion and £17.3 billion but a new estimate is being developed based on a clearer route and more information.

The NAO estimates that there is a £3.3 billion funding gap over four years (2017-18 to 2020-21) which the government has yet to decide how to fill.


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