The £70bn price tag for the HS2 rail project is set to be revised upwards to account for inflation within months to a figure closer to £91bn.
According to analysis by the FT based on Office for National Statistics indices, the hike will increase pressure on the prime minister to scale back the scheme.
Rishi Sunak is not only considering axing the northern phase of the line but is also considering making its London terminus Old Oak Common to the west of the capital.