The RAF is still the only place that you, the British citizen, can fly a fast jet.
Unless you're R Branson Jr.
I agree with the others, including Clockwork Mouse.
ps. I am fairly critical of many RAF things, but can unreservedly say that if you can have as much fun as I did in my first 10-12 yrs, then it'll be worth it. Sadly, for many of us the novelty fades and wears off all together, but that would probably have happened in any job.
Just go for it. You only live once.