Quick question, I am on the BA491 which has been diverted to MAD for medical reasons. The Captain came around after landing stating he could have landed at BIO rather than MAD, but he felt MAD was better organised. medically I understand either diversion field was fine, but I am curious, would it have been better to land at a non slot constrained airfield? From what we are told the medical condition was not life threatening, so please do not bite my head off