Academic worries
Hi I've just read your posting and I'll be honest with you.
If you're worrying academically already then maybe it's not the career for you.
ATCO's require a high level of numeracy skills, spatial awareness and quite alot of academic qualities.
I think the reason they don't ask for certain grades is because they are willing to give anyone the oppurtunity to pass their tests.
But to put it bluntly if you're not confident in your academic abilities you won't pass.
The selection tests are tough, I studied Maths, Physics and technology for A- levels achieving high grades in each and found the tests very difficult- I didn't think I was going to pass.
If you don't like college- you do realize that you required to study at Bournemouth college for 18 months and then until you're validated?
You say you have you're heart set on it, you need to figure out why this is and justify your reasons.
Good salary is not a reason alone or the fact that you may love Aircraft.
I don't mean to be too pessimistic but realistic. If you've got what it takes you'll make it.
So think it through, Make sure your Mental arithemetic is excellent and study hard.
Good luck!