Level 3 apprenticeship is equivalent to two A-Levels. Level 3 apprenticeships are a popular next step after completing a level 2 apprenticeship.
Companies will usually look at applicants who have completed a level 2 apprenticeship or have 5 GCSEs. In certain circumstances, no stringent requirements are needed to be eligible for a level 3 apprenticeship.
In this situation, though, you will almost certainly be expected to have previous business experience to be admitted.