It should be national minimum wage...apprentices work just as hard.
They THINK they work just as hard, but all (initially) require constant supervision and can be a liability.
Put that with the fact you take longer on a job with an apprentice and the fact that they are at college for 17 weeks in the first year (whch the employer had to pay, and also pay someone to take their place)
You should be glad you have an apprenticeship as there is a major recession happening (it will take 2 years to get back to a normal footing).
My advice
don't be cheeky
don't walk before you can run
ask questions
get brian scaddans domestic electrical wiring book
NEVER stand about - there is always something to do (even tidying up)
Always try and anticipate what your tradesperson needs and have it ready