I got funding to do a level 3 course in youth work related stuff. I already had a degree/phd which I haven't paid off yet, so it's perfectly possible. You gave to start paying it back when you earn. 21k.
I got a letter from my training provider with the reference numbers the Student Loans people needed, filled in their online form, and got the paperwork back within a couple of weeks. I'm not sure that a level 2 course qualifies though - I'm starting a level 3 diploma in September, but had to pay for the level 2 Certificate myself.
I think you will find that 24+ loans are only for level 3 courses at the moment so you will not qualify for one for a level 2 course and given your existing qualifications it seems unlikely to me you will get other fee remission. of course this is all on limited info so you will need to check with the college you are applying to