It's a interesting one.
Would say not many places in England still have the 11 plus most areas got rid of it a long time ago. But I definitely took SATS.
The A level entry thing is interesting, when I applied to uni 2 of my choices were in Scotland. Because of my A levels one uni offered me straight into 2nd year, the other one remained a 4 year course. So it definitely used to be possible for some unis to have it as a 3 year course. I was told it was because my ALevel year was the equivalent of the first year.
I have always found it a bit strange that a 17 year old can go to uni mainly as I used to do student welfare stuff in my 20s. It's a big adjustment for many even at 19/20 let alone 17 when actually a year or two can make the difference of being socially ready alongside academically ready.
Our DS will remain at nursery for a extra year because of the social development side of things.