HS2 is the UK's largest infrastructure undertaking, supposed to rework public transport between London, the Midlands and the North.
But it's changing into synonymous with political football, disappointment, delays and spiralling prices.
It's been backed by a couple of authorities and political celebration through the years however Prime Minister Rishi Sunak has declined to throw his assist behind the total undertaking, leading to fears the Manchester part of the road might be scrapped.
It's the most recent setback after the March announcement that components of the road might be delayed, prompting questions of whether or not the UK is able to delivering giant infrastructure tasks.
Interventions from five regional Labour mayors and quite a few northern companies have carried out their finest to retain the present plans.
What is HS2?
HS2 is 330 miles of deliberate high-speed rail community, initially meant to hyperlink London and the West Midlands, stretching to Birmingham, with an additional section extending to Crewe, Manchester and Leeds within the North. Cost issues in 2021 led to the shelving of the Leeds stretch.
It was first mooted by the Labour authorities in 2009.
The undertaking has been beset by delays and rising prices, with some estimates now placing the value tag at greater than £180bn, a determine that is repeatedly risen from the 2019 estimate. In 2019 prices have been put at round £100bn.
How a lot was it imagined to price?
The unique invoice - at 2009 costs - was imagined to be £37.5bn.
At the time of the 2010 election, estimates of the price of HS2 ranged upwards of £20bn.
By January 2012, when the broad route of the proposed scheme was in place, this had risen to £32.6bn.
In June 2013, the coalition authorities elevated the general price to £42.6bn and in November 2015, when the figures have been up to date, consistent with inflation, to £55.7bn.
The Department for Transport's newest estimate in 2021 had spiralled even greater, to between £72bn and £98bn.
But Lord Berkeley, former deputy chairman of the federal government's impartial evaluate into the undertaking, mentioned it might climb to £107bn.
It might be the 2040s earlier than passenger providers are working on the total community.
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New stations and 18 trains an hour
HS2's inception follows the event of HS1, the high-speed line between London and Kent connecting the UK to routes on the European continent.
The goal is to run 18 trains an hour in every route to and from London - at speeds of as much as 224mph - in comparison with between two and 6 an hour on Europe's high-speed railways.
It includes the development of greater than 300 bridges and 70 viaducts for the London-West Midlands section alone.
There may also, underneath present plans, be new stations - together with Birmingham Curzon Street and extensions for London Euston and Manchester Piccadilly.
The undertaking is designed to satisfy the long-term progress in demand for rail providers, enhance the reliability of the community, increase connectivity by making journeys sooner and simpler, and assist financial progress throughout the UK.
What is the route?
Stations on the primary section of the road might be London Euston, Old Oak Common in west London, Birmingham interchange and Birmingham Curzon Street. There are, nonetheless, issues the London Euston station terminus might be axed as it has been placed on pause as a consequence of spiralling prices.
The line will as an alternative finish in Old Oak Common, requiring passengers to get the Elizabeth Line to central London.
This means it might be greater than a decade earlier than high-speed providers cease at Euston, with passengers anticipated as an alternative to journey for half an hour on the Elizabeth Line.
The second section will see trains head northwest to Manchester Airport and Manchester Piccadilly, or use current strains through Wigan, Crewe and Stafford.
The route had additionally been deliberate to go northeast from Birmingham in the direction of the East Midlands Hub at Toton.
From there, earlier than the japanese extension was cancelled, the trains have been as a consequence of proceed on the HS2 line to Leeds, with others diverging onto current strains through Chesterfield and York.
Delays to the Crewe-northwest section have been additionally positioned for 2 years.
Where did all of it start?
In 2009, underneath Labour transport secretary Geoff Hoon, the federal government arrange an organization, HS2 Ltd, to take a look at proposals for a brand new high-speed line.
The following 12 months, the Department for Transport (DfT) set out plans for a Y-shaped community connecting London and the cities within the North.
Later, underneath the Conservative-Liberal Democrat coalition, it was confirmed that the road could be inbuilt two phases.
Phase 1 would run from London to the West Midlands, starting in 2026. That's been pushed again to between 2029 and 2033. Euston Station just isn't as a consequence of open till 2035.
Phase 2, extending from the West Midlands to cities within the North, would begin in 2032-33. But that is been moved to any time from 2034 and 2041.
Why is HS2 so not on time?
By July 2019, the federal government accepted that the timetable was now not possible and has continued to alter opening instances.
Reasons for the delay included a 12 months spent revising price and schedule estimates for section 1 and extra time being wanted for building at varied websites.
In August 2019, the federal government introduced an impartial evaluate of the programme to advise on whether or not to proceed.
And in March of this 12 months the federal government introduced extra building could be delayed by two years to economize.
The COVID-19 pandemic most likely did not assist with progress, both.
In a written ministerial assertion earlier this 12 months, Transport Secretary Mark Harper mentioned the federal government is "prioritising HS2's initial services" between Old Oak Common in west London and Birmingham Curzon Street.
Why have the prices risen a lot?
In one phrase: inflation.
Mr Harper already mentioned earlier this 12 months, "we have seen significant inflationary pressure and increased project costs, and so we will rephase construction by two years, with an aim to deliver high-speed services to Crewe and the North West as soon as possible after accounting for the delay in construction".
A report in January 2020 by the National Audit Office (NAO) - the spending watchdog - mentioned HS2 Ltd had not accounted for the extent of uncertainty and danger within the plans.
It used a technique for calculating how a lot further could be wanted "that was not appropriate for a programme at such an early stage of development".
Among the elements inflicting greater prices have been commitments to extend the size of tunnelling and to erect noise limitations.
The NAO mentioned the federal government and HS2 Ltd had "not adequately managed risks to taxpayer money".
More cash was wanted for constructing bridges, tunnels and stations than first thought.
Complex points involving the invention of asbestos and archaeological stays, and the necessity to divert extra fuel and energy strains than anticipated, have precipitated issues too.
More cash was additionally wanted to purchase properties to make means for the rail line.
Even after these have been accounted for, there may be uncertainty round the price of extending London's Euston station to accommodate the high-speed trains.
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