Same boat - my club has passed candidate's special needs assessment from school onto CAA. We await response with interest!
I know that at my university (in my proper job I'm a lecturer), a 'special needs' student can, if the disability is severe enough, get
(i) extra time (10-15 mins per hour);
(ii) a reader, ie someone to read the paper to the candidate;
(iii) a scribe, ie someone to write the answer;
(iv) a computer with special needs software;
(v) special coloured cellophane, to cover the paper to make it more comprehensible.
I believe that appropriate training will compensate for learing disabilities. However, I have experience of a student, when asked to climb from 1000' to 1500' actually climbed to 5100' (I remember thinking, as we passed 2000' that we'd end up at 5100); but that's a very obvious and simplistic example of a special needs student. My employer tells me that all individuals are different, eg numbers, arithmentic, writing, comprehension, etc.
Good luck
