The controversial High Speed Rail 2 (HS2) project has been given yet another green light on Tuesday.
Prime minister Boris Johnson confirmed the project will go ahead after years of false starts and protests.
It is the latest twist in a transport saga stretching back more than a decade, in which the government has been accused of knowing the project was over budget and behind schedule.
The then-Labour government sets up HS2 Ltd to look at the case for building a high-speed railway line.
The newly-installed Conservative-Liberal Democrat coalition publishes a consultation on a route from London to Birmingham, with a Y-shaped section to Manchester and Leeds.
HS2 is given its first major green light when transport secretary Justine Greening announces the government has decided to go ahead with the project, despite concerns over its cost and the environmental impact of construction.
In a major step towards approval, the High Speed Rail (London-West Midlands) Bill setting out the powers needed to build phase 1 of HS2 between London and Birmingham is introduced to parliament.
The Supreme Court rejects outstanding appeals by opponents of HS2.
The National Audit Office warns HS2 is under financial strain and could be delayed by a year.
In a significant green light, the High Speed Rail (London-West Midlands) Bill achieves Royal Assent, enabling preparation work to begin.
Sir Terry Morgan resigns as chairman of HS2 Ltd amid criticism over his role as chairman of Crossrail, which is delayed and over budget.
The Conservatives commission a review into whether and how HS2 should continue, led by former HS2 Ltd chairman Douglas Oakervee, with long-term critic of the project Lord Berkeley acting as his deputy.
A report by HS2 Ltd chairman Allan Cook says the railway may not be completed until 2040, and the scheme could cost £88 billion.
The Oakervee Review is widely leaked and finds that HS2 could cost up to £106 billion, but concludes “on balance” that the project should continue.
Prime minister Boris Johnson is expected to give another green light to HS2, approving the whole line. However, the government will reportedly try to make changes to the second phase of the project involving Manchester and Leeds to save money.