I have some recollection of case law that stated that the role of the tribunal is to weigh the evidence and cautioned against the tribunal and particularly MQM making their own diagnosis but have been unable to turn anything up on usual searches. Any help? This can be a particular problem in this jurisdiction where the tribunal generally have the full GP records before them.

R(M)1/93 "it is clear that the medical member is intended to use his specialist knowledge in interpreting the evidence...he is not there as a substitute for evidence...he is precluded from conducting a walking test or making a medical examination of the claimant..."

Thanks this is helpful and I got copy www.dwp.gov.uk/advisers/docs/commdecs/93_94/m_193.asp but I was thinking of something more recent.