in that case it is simple up until the day you quallify, you are on trainee wages which is around the 20k mark, the day you quallify you get a 50%

pay rise to 40k simples.
up until 2/3 years ago it used to be on a slidding scale so
year 1 25k
year 2 30k
year 3 35k but that is all finished now.