They should have made a freight line only in the first place but HS2 was done for all the wrong reasons. Most likely for private firms to milk the tax payer.
If they were thinking with their heads they could have planned distribution hubs away from city centres reducing the cost by magnitudes as they would avoid all the costly bits. Reducing freight cost which means cheaper products for Joe Bloggs (Maybe not so with Private equity leeches
) and a huge boost to the economy because everyone is spending.
A passenger rail network is pretty pointless in this country as personal travel is just cheaper and the vast majority of the population has access to it and busses can cover the left overs. We are such a small place by land mass and you can get to pretty much everywhere from central England in 3 hours by car.
Imagine a dedicated freight network being linked with say Liverpool, Southampton, Felixstowe and Hull. It would have been epic.