Hi Madsugars!
Sorry to hear bout your situation - it must be awful for you.
The good news is that your boss is in the wrong on many counts. Redundancy must be fair and follow legal procedures. People cannot be targetted for health, performance or any other reason. The crucial point is that it is the JOB that is made redundant, not the PERSON. They must also pay you anything owed and lieu of notice. Unfortunately, you haven't been in the job long enough to qualify for any redundancy payment. (I think 2 years is the minimum to qualify). You have a very strong case for an unfair dismissal claim. You probably also have a claim for discrimination under the Disability Equality Act. I would seek legal advice if I were you. This might even be covered under your house insurance if you have taken out legal cover - read your policy or give them a call.
The bad news is that your employer is entitled to dismiss you on grounds of ill health if you are not fit to do the job for which you are contracted. I think you would have a difficult task to prove you are fit to do this work at the moment.
In my opinion, the fact they have made you redundant rather than terminating your employment on the grounds of ill health has put them in the wrong. A solicitor would probably take this to an industrial tribunal, and you should win. Be warned, though, that even if you win the case, you will probably not get your job back. Compensation will depend on what the tribunal deems fair under the circumstances - and they will take all circumstances into account, including the length of time you have had off.
All the best
Smidge