Speak to the CAA about it. They have a bit of a sense of humour bypass about this sort of thing. It has happened many time before.
The examiner that was responsable for you sitting the exams. Has to keep records themselves. If they haven't they will be in trouble.
Send an email to the CAA explaining whats happened they will know who is the holder of the exam papers that you sat and one phone call from them will sort it out. It might take a few weeks but the worst thing that can happen is all the records turn up at Gatwick.
Good luck