entrance normally requires at least three A level qualifications and perhaps one AS level. The term AS level is short for Advanced Subsidiary level. AS levels are academic qualifications that are most common in UK educational systems. AS levels are considered the stepping stone qualification between GCSEs and the more commonly known A levels.

Before the most recent reforms, students would usually select between three and five subjects from the GCSEs they have just taken, for one "AS" year, the AS exams being