Hi SueR19
I would contact the tribunal services and say this is what you want to do and explain why. They cannot access all your records without your express consent. I would also ask whether the panel want 'all your records' or just clarification from GP and/or consultants of your medical condition.
I would be very surprised if a member of the DWP actually decides to attend next time. They rarely do.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems