This is a good article on B12 deficiency. It could be of interest to anyone with loss of feeling in the extremities, tremor, depression, fibromyalgia and other symptoms. Treating serious vitamin B12 deficiency
The article describes how the writers were sent around in circles by various agencies when looking for answers about NHS policies and practice, they ought to have made FOI requests to CCGs/ICBs for any guidance issued, projects started, evidence reviews done, any bulletin items communicated to parters, etc. That might have thrown up something more concrete.