The Government has been accused in the Supreme Court of "cutting corners" to push through the HS2 national high-speed rail project.
The Government has hailed a "landmark victory" for its HS2 high-speed rail scheme, despite legal flaws in the consultation process.
At a cost of £33 billion, this train line is neither cheap nor very popular with those living along its route.
City leaders have showed their support for HS2, which would run between London and Leeds, Birmingham and Manchester, at Downing Street.
A dozen council chiefs, including some from Scotland, met Prime Minister David Cameron to pledge their backing for the £50 billion high-speed project.
The leaders posed outside Number 10 with Mr Cameron holding a long banner bearing the words High Speed Rail for High Speed Cities.
The second phase of HS2 is scheduled to take the line north of Birmingham to north west and north east England by 2032/33.
Leeds City Council member James Lewis said: "2032/33 is a long time to wait and we would like to see work on phase two starting as soon as possible.
"We are not planning to build any more motorways so the only way the country is going to thrive is through HS2."
The HS2 Growth Taskforce is meeting key figures from across Yorkshire today as part of a series of roadshows designed to ensure regions maximise the benefits of high speed rail.
Supporters of HS2 claim it will play a key role in job creation, regeneration and development across the county. The journey time to and from London to Leeds will be cut from 2hrs12m to 1h23m.**
But opponents say it will cut a swathe through the countryside , cause a drop in house prices along the route and will be a very expensive white elephant.**
Commercial Secretary to the Treasury and Chair of the HS2 Growth Taskforce Lord Deighton said: *"HS2 will give a massive boost to Yorkshire, creating new employment and business opportunities, freeing up capacity on the railways and improving connections. *
"An estimated 70% of jobs from HS2 are expected to be outside the capital, which is why it is so vital that the Growth Taskforce meets with city and business leaders from across the country.**
"It is vital that Yorkshire does everything possible to maximise the benefits that the new north-south line offers."**
Taskforce member and Chair of the Leeds City Region Local Enterprise Partnership Roger Marsh said:"We are determined to squeeze out every possible benefit from HS2 for Leeds and the wider city region, so I am very pleased to welcome the Growth Taskforce to the city."
Tory grandee Lord Heseltine has come out firmly in favour of the £50 billion HS2 high-speed rail project which will link Yorkshire to London.
But he says the scheme's timetable should be accelerated and that the private sector should contribute to the cost.
The former Conservative Cabinet minister adds that supporting HS2 is as much an act of faith as a reliance on figures, and that the UK "must consider carefully the cost of not acting" over HS2.
Transport Secretary Patrick McLoughlin said the HS2 line was "not an expensive luxury". Outlining the Bill at third reading, he said:
This is the point when the debate starts moving from 'if' to 'when'. Just this week with the storms that hit the south and the east, we have seen how crucial our railways are to national life. When trains are crowded and disrupted, life for hard-working people gets more difficult. That's why the new north south line isn't some expensive luxury.
MPs will vote today on whether or not the controversial High Speed 2 project should go ahead. The government are committed to the rail link, which would connect London to Leeds. But dozens of backbench Tories and some Labour MPs are expected to vote against it.
HS2 Ltd commercial director Beth West has been talking to Calendar about the consultation process.
Anger has grown over Sheffield's attempts to have the station for the proposed high speed rail moved to the city's centre.
Neighbouring authorities and transport chiefs in South Yorkshire are angry that Sheffield is trying to force the Government to re-think plans to site the HS2 station at Meadowhall.
Today, HS2 bosses came to Yorkshire to listen to the arguments about the location. Our reporter David Hirst has been looking at why there's been such a difference of opinion.
Sheffield Council's campaign for a city centre high speed rail station has caused a row with neighbouring authorities and transport chiefs. The Department For Transport wants to locate the HS2 station at Meadowhall - just off the M1 motorway - and Barnsley, Doncaster and Rotherham agree.
But Sheffield Council has produced several reports arguing that it should instead be based on the site of the former Victoria Railway station in the city. A conference is being held at Meadowhall today involving representatives of HS2, South Yorkshire councils and business leaders.
The HS2 Ltd Board is meeting with local business, transport and council representatives in Sheffield today.
They will discuss the merits of a city centre high speed rail station, developing a joint approach to skills, and how the wider region can benefit from this major infrastructure investment.
The Board will also be hearing about regeneration opportunities at Meadowhall and how transport connections across the region could be improved.