Hey!
I'm doing primary ed QTS so it's a little different but I would imagine the basics are the same.
You need B in english and maths and a C in science GCSE I believe (unless it has recently changed). WHen you apply, you will do a literacy and numeracy test which you must pass to teach. I am uncertain whether this would be the same for secondary for PE, but possibly as english is definitely still involved.
Like I said, my course is primary and QTS, which means no PGCE for me, I'm qualified at the end of the degree. My course is 4 days a week 9-5, not including private study time and placement. I did 8 weeks placement year 1 and doing 10 weeks this year. Final year is another 8 I think. You do a lot on learning theories and theorists.
The course is very theory based, which then translates into practice. Unlike other courses, if you don't do reading for your assignments, classes or placement you will really struggle. There is a lot of private study and it is a challenging course; you need to be totally committed and be prepared to have little free time when things start going a bit bonkers (3 assignments and placement all within a month for example).
Hope this helps a bit? Let me know if I can help any more.