Moving out

Hey guys,
Just a quick one
Basically I've been having problems at home and my so and his mum have said I'm allowed to move in with him. I'm all up for it as I have an apprenticeship waiting and it means no arguing with mum anymore
However I'm 17 and my mum is basically saying that I won't be looked after down there, he lives in Devon and I live in the West Midlands so it's way out
But she's always welcome
First off are you allowed to move out at 17 without consent if there's a valid reasons (education and mental abuse) in the United Kingdom as i looked it up and had mixed answers
So I was just wondering if any of y'all knew😏😊