West Coast debacle throws concerns on HS2 David Cameron is under growing pressure to release an official government document that flags concerns about the proposed £32.7bn high speed rail line, dubbed High Speed 2, in the wake of the fiasco over the West Coast main line franchise. A group of MPs are set to ask the prime minister to release an assessment by the government's Major Projects Authority into the proposed HS2 link between London and the north, which classifies the project as "amber/red" - Whitehall code for "in doubt." The MPs include Conservatives Andrea Leadsom, Ian Liddell Grainger, Stewart Jackson and Steve Baker as well as Frank Dobson, the former Labour minister. Mr Baker, MP for High Wycombe, said the "incompetence" exposed at the Department for Transport by the West Coast debacle raised fresh questions over the economic case for HS2. "I have always argued that HS2 looked like a bad deal," he said. There should now be an open and transparent review of the line, which is potentially an even greater shambles. The Cabinet Office said the Major Projects Authority would soon publish its annual report, which could include more detailed analysis of HS2. Mr Cameron has backed the project as a way to improve Britain's ageing infrastructure and narrow the north-south economic divide. The DfT said HS2 was "completely unrelated" to the West Coast issue and vowed to push ahead. But critics have questioned the financial models used to justify the scheme and this week's events have given renewed vigour to their campaign. "There is a lot of things wrong with the way the business case was put together on HS2 and there is a need for an urgent review," Martin Tett, leader of Buckinghamshire Council and head of a group of local authorities opposed to the line, which would pass through the picturesque Chilterns. Everything we have said about the DfT's very lackadaisical approach has been flushed out into the open in the West Coast debacle. The methodology behind the DfT's case for HS2 - the first phase of which would connect London to Birmingham - is set to face scrutiny in December, when it faces five separate judicial reviews. The line, which would eventually run to Manchester and Leeds, is designed to take the pressure off the West Coast main line, which government forecasts show will be at full capacity by 2030. The DfT this week cancelled a deal for FirstGroup to take over the West Coast franchise from Virgin Rail after finding serious technical errors in the tender process. Fallout worsened on Friday as Kate Mingay, one of three officials suspended over the affair, launched a public attack on the government. She accused the DfT of "inaccurately" portraying her role in the process. Mrs Mingay, director of commercial and technical services, said she had not had lead responsibility for the project nor had any responsibility for economic or financial modelling on the train line. The FT understands the other two officials suspended, pending an internal investigation are, John Gilbert, the DfT's head of rail procurement, and Supriya Bhol, a more junior member of the West Coast bid team. Neither could be reached for comment. The transport department is facing potential liabilities of hundreds of millions of pounds over the U-turn. Shares in WS Atkins fell 5 per cent on Friday because the group was one of the main technical consultants used by the government in the botched West Coast award. The group also played a role in preparing passenger forecasts for HS2. WS Atkins said in a statement: "We do not believe there are any issues concerning the quality of the advice that we provided. We believe that we have applied properly assured and technically appropriate approaches in line with the department's franchise replacement process and our own internal processes. We will be fully co-operating with the department's internal investigation if requested to do so. Additional reporting by Sarah Neville