Northern Powerhouse Rail is a project to improve rail connections between major Northern cities. It is also known as HS3.
The Government Transport minister, Chris Grayling revealed to the Financial times that not all aspects of Northern Powerhouse Rail would be fulfilled.
Source: Manifesto - Page 24
Reference 1: Newspaper Article 1
Reference 2: Chris Grayling quoted in FT
Reference 3: Newspaper Article 3