5 GCSEs/SCEs and 2 A-levels or 3 Highers or equivalent. GCSEs/SCEs at Grade C/3 minimum to include English language and maths....... or equivalent. So you could join with 5 o levels, a degree in Botany...but no A levels.
How do I know this???? cos I is this..? Actually I got 6 o levels but the GS one shouldnt count as I cheated.