NO, my school had French as a compulsory subject when I did GCSEs, they have now changed it to French or Spanish or German. But anyway I came out with a B because I did no revision, I didn't care how I did as I knew that it wouldn't help me in the long run. I should be good at french because I had learnt it for so many years but still had no grasp of the basics and can remember virtually none now (2 years on). The way it is taught in British schools is awful, it doesn't teach you how to speak it properly, which in the long run, for future use is the most important part. It mainly concentrates on grammar which wouldn't be used often or things which just wouldn't come up in an ordinary conversation.
My additional two years taught me very little and I wouldn't recommend it if you aren't interested, although it does sound like A-level is worthwhile (from friends who love it) as you learn how to use the language in perspective, read literature and articles in the language, rather than concentrating on things of little importance.