If you take a look at the BT apprenticeship website (eg
this page for Openreach engineers, or
this page for Wholesale work), you can see that they have 3 different programmes: Advanced, Higher and Degree.
These have entry criteria as:
For our advanced programme you will need to have achieved or are predicted 4 GCSEs at grade C or above including English Language and Maths.
For our higher programme you will need to achieve (or have achieved) 2 A-Level qualifications with a minimum of CC grade by September 2017 (or equivalent qualifications). In addition you will need to have a minimum of 4 GCSE's at grade C or above including English Language and Maths.
For our full degree programme you will need to achieve (or have achieved) 3 A-Level qualifications with a minimum of BCC grade by September 2017 (or equivalent qualifications). In addition you will need to have a minimum of 4 GCSE's at grade C or above including English Language and Maths.
The
"What is an apprenticeship" page then tells you:
ADVANCED
You'll work towards a Level 2 or 3 NVQ through work-based learning whilst also achieving functional skills, which are supported by a knowledge based qualification such as a BTEC.
HIGHER
You'll work towards Level 4 through work-based learning which is consolidated by the achievement of a foundation degree.
FULL DEGREE
You'll work towards our work-based learning degree qualification.
It looks like BT have set up a very structured apprenticeship scheme ... and it wouldn't surprise me if you slotted into that structure in some way.