David Cameron has the CBI conference that he has ordered the new boss of the HS2 rail project to find ways of cutting costs. He accused critics of the project of "putting the country's future at risk."
David Cameron says he aims to get "every penny for value for money" from the investment in the controversial HS2 rail project.
Speaking at the annual CBI conference, Mr Cameron insisted the scheme would "unite the country and drive economic growth".
The Prime Minister said the leader of the HS2 scheme, Sir David Higgins, would "drive every extra bit of cost out of the project" so it comes in under the estimated £50 billion budget that has been set.
The Prime Minister went on to claim that critics of the project were "putting the country's future at risk" and called for a "concerted consensus" across business and politics to get behind the project.
A Labour government would set up an independent infrastructure commission to end delays in major infrastructure projects such as HS2, according to Ed Balls.
The shadow chancellor is expected to tell today's Confederation of British Industry conference that an infrastructure commission would "end dither and delay in infrastructure planning and build the consensus on infrastructure that we need to invest for the long-term".
Ed Balls will express his commitment to HS2 today, but will reiterate that Labour's support for the project is "not at any cost".
He is expected to tell the annual Confederation of British Industry conference today: "Labour supports HS2 and the idea of a new North-South rail link because of capacity constraints on the existing rail network. But our support for it is not at any cost.
"The Labour Party cannot - and will not - give the government a blank cheque."
He is expected to say: "Britain is in a global race for jobs and wealth. Our infrastructure is decades out of date and we urgently need to invest and build.
The Prime Minister has tasked the new boss of HS2 with cutting costs, amid criticism from Labour that the project has a "black cheque".
The Prime Minister accused delayers of "betraying" those in the north who are most likely to benefit from the high-speed rail project.
"Those who want to delay or obstruct HS2 show a lack of vision. They are playing politics with Britain's prosperity. They are betraying everyone north of Watford. And they want to condemn Britain to the slow lane.
"We can either tell our grandchildren we made big, long-term decisions to build a better country... Or we can tell them we dithered for decades while the world raced ahead.