VB
Unfortunately the ATOS department that books the medicals do not have access to the ESA50, except to note when you are available, and not always then, so they take little notice of whether the claimant is able to to actually get into the assessmnet centre.
I hope your friend had all their travelling expenses re-paid, and they would be entitled to make a complaint to ATOS.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems