CB v SSWP  UKUT 15 (AAC)
Thanks to Angela Wall of Butler Solicitors for pointing out this case. She recently had a case in which several requests for an all-female panel were declined, but on review the MHT cited this UT decision and accepted that an all-female panel was required in order for the patient fully to participate in the hearing.
From Gov.uk website:
Employment Support Allowance - tribunal deciding to proceed in absence of appellant - appellant with gynaecological problems and difficulties with bowel movements requesting all-female First-tier Tribunal panel - principles governing composition of tribunal - overriding objective.