Thanks for all your suggestions 😀
I have picked Cosford as my main visit (besides Flying Legends) and have a few as number two (if i’m allowed another, or for the home trip).
I have found this website usefull to check the individual museum:
http://www.britishaircraft.co.uk/museum.php
But unfortunatly its listed after counties, and i have no clue where most of the are. A a “point and click” map would have been easier.