One of my oldest friends is American, married to a Brit. They have always lived in the States and have two boys aged 13 and 12 who are dual citizens. They want to move back to the UK, but they're not sure how this work with the boys education - is it even possible to find places for a Y10 and Y9 boy? Those are the years they'd start in September.
I'm not a huge amount of help as my children are younger and I was educated abroad, so my experience of the UK educational system is limited.
They'd be looking at state schools rather than private.
They haven't decided where they're going to live yet, I think schools will be a major factor, but at the moment they're looking at Oxfordshire, Cambridgeshire and as far west as Bristol and surrounds.