Two members of my team have boys in y12.
One boy attends a very good independent; the other goes to the local comp.
One boy has to log on for headmaster's address at 8.30, in uniform. All lessons delivered on zoom until 4pm. PE still happening on zoom. Exams arranged for late August so there are reasonable predicted grades for uni applications.
One boy gets three half days of lessons. Morning lessons have fizzled out, two thirds of the boys have stopped bothering at all. Teachers not in regular contact with parents. School doesn't have clear guidance re September.
Both schools would say they are following government guidelines.