I'm guessing it means GCSEs, in which my son got four 9s, three 8s, and two 7s, as well as 9 in a short-course.
He's been getting As and As in all big mocks.
In smaller class tests, he's been getting As, As, and a few Bs earlier on in the year, with one recent U due to a panic attack.
A teacher online was suggesting using some Alps system which would suggest he would be given As based on prior attainment (GCSEs), even though he's been aiming for As and has A in his coursework.