Thank you. If Broomhill accept him, would he be embarking on A-levels early - presumably that was the system at the old place, do O-levels in December so Oxbridge Fourth Term exam entrance was in fact two years later and thus have kids an advantage. Or would he be doing other O-levels at Broomhill that academic year?

It was Dartmouth raising its entry age to 16, so Peter shouldn't be there even in canon, that I was thinking of. I figure the Marlowverse could have ended up with a version where the now-under-age pupils attend essentially a boarding school where Cadets is taken extra-seriously.