Credit where credit is due. Got a reply after three hours.
It's not great news though, they've said they won't consider an exemption until June (2 months prior to my exams expiring) and to get back in touch then using the appropriate form. The form mentions operational reasons only as you discussed Paco, so I've sent another email asking if they'd possibly consider the delays due to the CAA Medical Department slowness to be 'operational' reasons. Will post back as soon as I hear more.