Hi, sorry I was offline by the time you had replied. Whilst the employer had the legal right to terminate your employment, either by dismissing you on grounds of capability, or retiring you early, they cannot be forced to do so. They make the final decision as to whether your employment is actually terminated or if you remain on their books as an employee. It is entirely possible that you are off work for an indefinite period of time, either receive sick pay or no longer do so as it has run out, and remain n employee of the company because it does not want to terminate your employment. You are of course free to raise this possibility with them and ask them to consider early retirement or a capability dismissal but if they refuse to terminate your employment you would either have to remain employed by them or consider resigning yourself.
Hope this clarifies your position? If you could please let me know that would be great, thank you