Check out the BA site, there are various work expeience opportunities in different departments of the company.
Also, check out
www.yini.org.uk (i think) if you are into engineering of any sort. This is a fantastic scheme where you get to work as an engineer and be payed for a year before Uni.
Although I'm not sure whether it is a bit late for you to apply.
Anyway, good luck in whatever you do, and if you want to e-mail me in future to tell me what you eventually did, feel free, as I would appreciate some info
Regards
Mike