Cheers Seb, couldn't have put it better myself!
I think building up a good portfolio/showreel of work is really important - something that really shows off what you can do. Qualifications aren't everything, but taking courses in art/animation/film (whatever you feel passionate about) are likely to develop your skills in ways you may not have imagined otherwise.
Have you had a look at the jobs section of the Aardman website?
http://www.aardman.com/html/jobs.asp
There's some useful information pages on there, plus I'd recommend checking back regularly to see the type of jobs that are advertised and their accompanying descriptions. That way, you should get a better idea of what skills are required.