fOOfight.. You need to contact SRG Medical Department at Gatwick, tell them the situation and get some advice. I don't know about Prozac or what OCD is but you must discuss this with the medics. If it's a problem which has been sorted out I imagine you would be OK. However, without wishing to upset you too much, I suspect the arm may be the major problem, although I do not know official policy. During a lifetime in the profession I never worked with anyone in that situation and I can think of a number of reasons why you would have difficulty doing the job, unless you have an artificial limb which functions pretty well. Hopefully, now, others will post plenty of information about one-armed controllers (working like paperhangers!!).
I wish you all the luck in the world.