Thank you for your post - your experiences sound like my fears.
My DH works in aerospace and I work in management; both have really good jobs and DH employer are throwing a lot at him to stay (25% pay rise and flexible work so far). We live in South Manchester.
The primary reason for wanting to move is my family and the nostalgia of what I grew up with beach house camping etc; I don't want to regret anything but do wonder.
We are however going out for 3 weeks in May to really review things; I know it isn't like living there but as I havn't been back for 3 years I need to get a feel for things and understand everything such as commute, housing, jobs etc. Will look at everything with open eyes. However the negative on the UK is that they won't even approve 3 days leave for my 4yo son to come out and visit. Although the schooling he is having is amazing.
Certainly one gripe is not getting even an automatic reply for any of the jobs we have applied for; not even a thanks but no thanks which is quite rude.