This sort of thread tends to attract people who have done it and liked it.
I was brought up up north, and most of my family live up north now.
There are some things I like about here, some things I'd like about being there. But the biggest thing I'd like is being near family if I was up there. The next thing would be the housing, but after that most of the things I've been told for years are better up north, I disagree.
My dsis lives in a small town similar in size to ours, both of us in an estate off to one side.
We're actually closer to the countryside than they are-can be away from all traffic etc in 10 minute walk, walking along off road paths almost the entire way. They wouldn't walk out into the country as the country roads are too dangerous to walk along with children and there's no pathway out.
My dsis complains her dc don't get the opportunities mine do. There just isn't the variety of things to do that mine have done. And I'm not travelling far, often walkable.
I find the attitude very insular. They really can't understand people not wanting to live there. Either that or they don't realise that asking (often more than once when you've just met them) "don't you wish you lived here?" Is actually getting rude.
I find my town more friendly than theirs. If I'm out on the estate most people say hello. I've got chatting yo people people offer things they have spare (at one point I'd been offered 4 TVs, some from people I don't do more than a quick hello, in a month)
She ended up having to pay someone to come and help manoeuvre a sofa into the house. I could ask any of my neighbours and several other people.
And your southern accent will be branded "posh" by adults and children alike. I have a slight northern accent and the most I get down here is "that's not a local accent, where do you come from", but dsis, who has a slight southern pronunciation when she's not thinking often has people saying "you speak posh"
And don't ask dsis about hanging the washing outside. One summer she kept a note from May through to September. They had in that time 4 days she it didn't rain at all. And they still had a hosepipe ban.
Schools. Dsis is in a grammar area. We're not. I don't know what the percentage they take to the grammar, but it doesn't do brilliantly. If you compare the top half results from the dc's comprehensive, it does better than the grammar. And of course the non-grammars do worse. We have a choice of 3 comprehensives all of whom were similar-ours is the middle by reputation.
There are great things about up north, but go into it with your eyes open. Look at it properly rather than hearing people who have done it and stayed saying it's good.
You could end up in a village like the one my grandparents were in, that still referred to one of their neighbours as "the newcomer from " 25 years after she'd moved there. Probably still do.