Update - spoke to GP today by telephone to discuss my ongoing neurological symptoms following 5th B12 injection. I was fully prepared, expecting to have to fight my corner. No need. The GP was fully aware of NICE guidelines ' For people with neurological involvement.' Set to have further injections on alternate days for next 2 weeks , then a further review with GP. Phew! Was so relieved. To be fair they have always been an excellent practice throughout the years.
She is also planning to speak to a neurologist for further advice regarding my neurological symptoms.
Over recent days I have experienced short periods where I felt 'normal' again. It has been quite awhile.
Thanks everyone.