I am sorry to hear about your ailments. However, it may well be the case you (he) are entitled to more benefits than you are aware. The difficulty is that you require to apply for specific benefits to the DWP and wait for the application etc. However, the best thing to do is drop into your local citizens advice bureau (CAB). They can go through your personal and financial position in detail and enter these details into what is referred to as the QBC system. This system will calculate what benefits you are entitled to and how much. The system will also do the entire calculation without contacting the DWP so no other benefits would be affected in doing this calculation. Furthermore, if you are rejected initially for any such benefits, the CAB can help you with the mandatory reconsider (appeal) of the refusal. If this is still rejected but it is believed you have a claim, the CAB can also provide you with representation should you require to go to a tribunal for the matter.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
https://www.lawsoc-ni.org/solicitors (N. Ireland)
Hopefully, I have answered your query in a way that is simple and easy to understand. If anything remains unclear, I will be more than happy to clarify it for you. In the meantime, thank you once again for using our services.
Should you require any further assistance on this matter, please do not hesitate to post a further questions for additional assistance.