Planning journeys descriptor b vs CFS

Thanks, I think that focusing on the cognitive impairment is the way to go. Maybe I need to find a source that covers this in CFS in case the tribunal needs to be educated.

Have you had your tribunal? I think the source I'd be going for would simply be medical evidence about you personally . Like many on here i have several disabling conditions and one of them is a diagnosis of CFS. Although personally I think I just burnt out after being partner in a management consultancy firm for years.
I digress. I submitted a medical evidence letter from the CFS/ME service whose care I am under. It stated his symptoms are ; and listed them as numbered bullet points. Then it went on to expand on how those bullet points/symptoms impacted on my daily living and mobility. One of the bullet points simply read 'Cognitive Dysfunction'. You need supporting evidence from either someone whose care you have been under or are under. If you don't see a CFS service ask your GP to write a letter stating you suffer from cognitive impairment or cognitive dysfunction. Even better if the GP can then briefly describe how this effects you in line with the descriptors this will help.
Taking in generic information to educate the tribunal will not help your case. They want evidence of how your condition effects you and aren't fans of being educated with generic examples about the condition of CFS.
I advise taking an advocate with you who you have briefed to argue your case. Often the catch 22 with cognitive impairment is that if you eloquently state your case through their observation of that they won't think you have any cognitive impairment otherwise how could you be so lucid. On the other hand if you are so impaired you can't state your case this is also a problem. Private Welfare Rights specialist are available to hire to take to tribunals but you could take a support worker, social worker etc. I recently had my medical at home as I am virtually housebound. I had a private welfare rights specialist and my carer to help argue my case.