Thankyou to everyone for replying. It's really good to hear different views and puts things in perspective.
I've been back once since we moved here, but that was almost six years ago. My main concern with moving back sooner rather than later is having to wait three years to be able to study as a domestic student in the UK, I feel like I probably realistically won't end up studying, just working and probably just stick in retail indefinetly (not that there's anything wrong with that- i've just always wanted to do nursing). Whereas I could have finished the degree by that time plus be working for a year and hopefully get a semi decent job.
Unfourtunately I don't have the money right now to go for a holiday (definetly not to move) so maybe the best thing to do is do the first year of the degree, work and then plan for a holiday december or november next year for four or five weeks.