If I remember right (and I left school only 6 years ago), I think we had about two double-periods of PE every week, and one single period. I don't remember how long a single period was, though (I think it was about 30 minutes but it's really quite vague in my memory).
I have to say, though, what I really dislike about P.E. as it's currently done is that it's basically a pseudonym for 'sport'. As if sport is literally the only way to get exercise or 'physically educate' people. I hated sport as a kid, and as a result always dreaded PE lessons and got precious little out of them. And I know for a fact I'm not the only one who would have experienced this as a child. I don't really see how cramming sport down children's throats is productive or useful. Or how indoctrinating them with the idea that some kids are sporty and some are brainy and if you're good at one you're not good at the other is remotely conducive to good education.
Personally I think (say) juggling is about as useful as any sport you care to mention for improving hand-eye-coordination, sports-vision, balance, etc. And also requires minimal equipment. And is also, in my opinion, a more beautiful, interesting and fulfilling pastime than any sport. I'll probably get laughed at for saying so, though :/.