I have quoted this from CSSD's website, look under any acting course then the "admission" page:
"Entry Requirements
Minimum entry requirements: 2 A Levels at C, 3 GCSEs at C, and selection by audition. Normal offers may be higher and depend upon expected grades and audition performance. Exceptionally applicants who do not meet this requirement, but demonstrate appropriate potential, may be accepted."
Drama Centre
"■A Foundation Diploma in Performance (level 3 or 4)
■A pass in 1 GCE A Level
■Passes at GCSE level in 3 other subjects (grade C or above)
OR
■Passes in 2 GCE A Levels
■Passes at GCSE level in 3 other subjects (grade C or above)"
Drama Centre do have a Directing BA but as above, it is vital to have A levels...Unfortunately exams are becoming more and more vital even for vocational professions as I have learnt
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