There's already a literature analyzing this. For instance William Lazonick's 1983 Business History Review article, "Industrial Organization and Technological Change: The Decline of the British Cotton Industry," and his subsequent book "The Decline of the British Economy: An Institutional Perspective" (1987)
Part of the issue with the UK being bad at manufacturing was (ok it’s a cliche but I’ll say it anyway) that Thatcherism in not wanting to deal with the unions and the social powers they represent, defeated socialism by destroying the work and replacing industry with nothing. There’s no reason the UK couldn’t manufacture ships or precision engineering or steel - it was set up for exactly that. But doing so involves negotiating with unionised power, who vote Labour, and it was a quicker solution to merely destroy and keep destroying social cohesion and the unions around it – “there’s no such thing as society” – by destroying and defunding the work. The London-based finance powers also lost interest in funding industrial production and its workers alongside when moving money around and corruption can be done from the office in London without having to negotiate with union bosses and their insistence for a bigger piece of the pie (that they’re baking).
If you look at somewhere like South Korea, who 60 years ago had no major engineering or shipbuilding, the UK could be leagues ahead of them. The difference is that the South Koreans had the appetite and impetus to do it, whereas in the UK the government and finance planners had the exact opposite impetus.
Power in the UK is highly centralised in London, but that's not necessarily bad for regional economic development, e.g. the office ban mentioned above would not have been agreed to by southern devolved regions and the redevelopment of the former East Germany was driven by Bonn (former West Germany's capital city). Competition in government also isn't necessarily good for regional development and the corn laws and free trade that the author credits to Northern England's influence caused another famine in Ireland in 1879. It's also worth noting the North East England referendum of 2004, when London's project of devolving power to the English regions was blocked because Northern English voters overwhelmingly didn't want it.
British manufacturing suffered an unusually steep collapse relative to other western countries in the late 20th century that hit Northern England particularly hard, while the benefits of the slightly later financial services boom were inevitably focused on the country's financial centre in the South. The manufacturing collapse was partially driven by government policies, but not in the way generally thought - for decades, pre-Thatcher governments had been taking fairly regular extreme measures in response to various crises (balance of payments deficits, unbalanced regional development, oil shortages, strikes, etc.), that made life much harder for businesses. But the collapse was mainly driven by the fact that Britain in the second half of the 20th century was mind-bogglingly bad at manufacturing. I suspect that the failure of that entire section of the British economy would be a better starting point for an analysis of what went wrong in Northern England.