The boss of HS2 says there could be delays in construction in a bid to get to grips with rising costs.
Chief executive Mark Thurston told the BBC that inflation was hitting all aspects of the mammoth building scheme, which saw costs spiral even before the more current cost of living crisis.
Phase One is well under way and involves a new line between London and Birmingham, while Phase 2a would see the line extended from the West Midlands to Crewe.