I don't get this thread.
OP, if you sold your house in London you bought 15 years ago and moved to Bradford you could buy a much bigger one, probably outright from the equity. If you sold your house in London and moved to Manchester you could buy a bigger one too.
If you are trying to buy a first home in London now it would be very hard because prices are crazy. There are very few bits of London that haven't gentrified to some extent.
But if you were born and brought up in Manchester or Bradford and working in an ordinary job, you wouldn't be able to buy a nice house in a nice area, and we do still have really bloody rough areas where you wouldn't want to buy. I am looking at flats for DC and the ones in areas where they'd like to live are 200k plus.
If you moved up here you'd be quids in , but if you lived up here your whole life you wouldn't be.
25 years ago, people working in my profession used to own 5 bed detached houses in nice parts of town. Now we are in 3 bed semis in ok parts of town. It's not a license to print money up here. House prices have more than quadrupled in my area in 20 years (and the BBC Londoners moving in with their equity richness had a fair bit to do with that, tbh)
Do you really truly think the North is on easy street? I mean the stats are very clear about inequalities in the North Vs the South of England. Health, employment opportunities, disposable income, education outcomes, graduate opportunities are all worse in the North. You are very simply wrong to think otherwise.
Since you don't appear to have ever ventured past Watford Gap I do wonder where all these chippy Northerners berating Southerners have been heard, as well. But if they did, they have got a point. Thatcher eviscerated a lot of traditional Northern industry and some areas have never fully recovered.