“I do not consider that the medical appeal tribunal misapprehended what physical disablement means, or that it can be said that they were wrong in law in concluding from their findings that it was physical disablement which was responsible for his virtual inability to walk … there may be cases of claimants suffering from a physical disorder such as Down’s Syndrome whose legs are capable of the physical movements of walking, but who are prevented by other aspects of their physical condition from making use of them … ”. 23. R(M) 3/86 concerned a claimant suffering from brain damage at birth which led to severe mental “subnormality” such that, although capable of the physical movements of walking, his behaviour while doing so was erratic and unpredictable so that at times he had to be physically restrained while on other occasions he refused to move”