Jemma,
I would recommend seeking relevant work experience wherever possible. What university are you at? Some degree courses often constitute a 6 - 12 month period spent in industry - I spent 6 months of my final year working in BAE Systems Flight Test.
A placement is also useful for determinining whether or not the line of work is suitable for you. If you do find that you enjoy the work (and if you perform well), then you may get offered employment once you complete your degree which saves the hassle of jobhunting. If you don't enjoy the placement - then you know where not to apply for work after uni!
Either way, a healthy period of time spent in industry will always look good on a CV.
If you're still looking at the military side of things - search all you can for information on the role of a Flight Ops Officer. Visit the AFCO for advice, post on the Mil forums or see if you can arrange a visit to your nearest RAF station so you can tag along with an Ops officer for half a day.
Oh, and finish your degree.
Woody