several of the big cities up north have good public transport as they are big enough to justify it.
I agree with you to a point buy 24-44 times per head spending difference is not good you have to admit. I see night and day defences between the likes Oxford and London and the northern (and beyond citys where I used to live and work and where family are, I’m talking about Manchester on the better end of things to Leeds/Bradford, Dundee/Glasgow etc.
Population density does not always link up with infrastructure spending, Oxford for example (and surrounding area) is small and not as population dense as London but has way better transportation links/service, internet speeds and other services then for example than Leeds/Bradford and surrounding areas.
Keeping infrastructure spending so low outside of London is not going to making the country more balanced and just fuels the divide between the south east and everywhere else in UK. Which in turn makes London's issues of overpopulation and lack of housing even worse as more people are forced to the south east where the jobs are especially skilled jobs are.