Our dd's have a very good chance of getting into an Ofsted Outstanding secondary school. It gets good exam results and is single sex, with an intake of 120 and known for its good pastoral care.
Unfortunately it does not have a 6th form. It feeds into a 6th form college, which is rather large. Students at the 6th form college can do well if they are motivated and they get a few into Oxbridge and medicine each year. However, the overall A'Level results are not particularly impressive. dd1 is bright but not exceptional, and I think she would welcome the chance to coast and party. (She is nearly 9, so I am being pfb, but I cannot believe she will change her personality).
Instinctively, I would not like my dd to attend the 6th form college. I would prefer to move her at 16 to a school with a traditional 6th form. Does anyone have any experience of schools with no 6th form, and what type of 16-19 provider is the best choice. dd1 is a late August birthday, and will still be 15 when she leaves school.