Hi. gogogoch. You do indeed sound like the perfect candidate for
PlaneTalk. It will help in all the ways you ask about and many others. It's a way of looking at the fretboard and a way of thinking about music all wrapped up together. It's especially handy for those like you who have been playing for a while and have all the basics down and whose fingers can feel their way around a fingerboard, but don't quite know what or why they're playing what they're playing.
The DVD isn't zoned, so it will play in the UK.