I know this is now quite an old post but felt I should add some advice, this is most certainly a case for an industrial tribunal, you can access the tribunal by visiting your local Citizans Advice Bureau, when you visit initially to tell of your incident they will make an assesment and then provide one of their own solicitors at no cost to yourself. I firmly believe you have a very strong case for Disability Discrimination, you have to proove nothing to your employer, it is for your employer to proove to the tribunbal that they have not Discriminated against you. The cost of doing this to your employer will almost certainly end with them settling the matter away from the tribunal with you. I also believe you would have a strong case for constructive dismissal, especially following the way you were treated following your hypo.