A new report has revised the benefits of the planned HS2 high-speed rail line, saying they will be lower than previous estimates.
In August 2012, it was stated was that the benefits of the £50 billion line would be £2.50 for every £1 spent.
However, increased costs have now led to a revised estimate of £2.30 for every £1 spent.
The new figures are included in a report published by HS2 Ltd and are based on a recalculation of the number of business people using the line and the amount of work they complete while they are travelling.
Channel 4 News reported Transport Secretary Patrick McLoughlin still wants HS2 to go ahead, although shadow transport secretary Mary Creagh told the programme: "We cannot give a government that is mismanaging this, or any project, a blank cheque."
The estimated cost of the scheme – planned to start in 2026 – is £42.6 billion, with a further £7.6 billion on trains.
It would reduce journey times from London to Birmingham, Manchester and Leeds to 49 minutes, one hour eight minutes and one hour 22 minutes respectively.
