There is wide variation among different groups in the attainment of three A Levels at grade A.
https://www.ethnicity-facts-figures.service.gov.uk/education-skills-and-training/a-levels-apprenticeships-further-education/students-aged-16-to-18-achieving-3-a-grades-or-better-at-a-level/latest
4:06
8:08
5:17
1:33