The call by regional heads of the CBI business lobby comes amid worries HS2 could be scaled back.Read more
A new body will be set up to bring more foreign investment to the north of England.
Prime Minister Boris Johnson will announce the new organisation at a conference in Rotherham later.
Northern Powerhouse Minister Jake Berry says it’s about bringing more jobs to the north.
Matthew Fell, from the Confederation of British Industry, says the government committing to a high speed rail link between London and the north is important.
“Firms will warmly welcome the ambition of the Prime Minister’s speech and the determination to unlock the vast economic power of the north.
“Committing to HS2 in full is a key part of ensuring investment flows into all corners of northern England, enabling firms to grow, create jobs and boost productivity."
Boris Johnson has spoken of the need to "inject some pace" into plans for a high-speed route from Leeds to Manchester.
A Yorkshire MP tells the prime minister her constituents can't decide which is delayed most - the Northern Powerhouse, promised by the government, or their next train.
Northern mayors and council leaders want more investment in transport after figures showed train services have got worse, despite the push of a Northern Powerhouse.
Cities like Leeds, Sheffield and Hull were encouraged to work together both in rivalling London and the South East and to "take on the world", with more jobs and opportunities.
But five years on, doubt has been cast on just how successful the project has been, with transport being one key area that officials want to improve.
The number of cancelled and significantly late trains on TransPennine Express and Northern franchises more than doubled from 20,000 in 2014-15 to 47,000 in 2018-19. It meant that almost one in every 20 services was either cancelled or more than 30 minutes late arriving at its destination.
Mayor of the Sheffield City Region Dan Jarvis, said the government should see the north as "an asset, not a liability" and said Westminster had "let the north down".
Judith Blake, leader of Leeds City Council, said: "The northern authorities are working much more closely together and that's a real benefit.
"The real difficulty we have is that (transport) schemes are delayed and there's a real lack of commitment to rebalancing the economy."