The rail program's overall price rose 30% since 2010 to $24.6 billion.

Despite last December’s deadline, CRL “did not start to produce a sufficiently detailed delivery plan…until late 2018,” the report adds.

Terry Morgan's ouster as chair of HS2 and Crossrail comes as the latter London tunnel line faces a new $2.5-billion budget hole and a likely finish beyond 2019.