So why the CAA asked the exact same question to the FAA a second time when they themselves already refer to the FAA initial ruling in the second AAIB report.
I think I'd prefer to see the question itself and the Chief Counsel's answer to the question the first time than the AAIB's interpretation of it. Your observation that the pilot was still operating without a type rating two years later suggests that it was not as simple as it might appear.
In pointing out the issue, I mean no disrespect to the FAA, only that the oversight of foreign registered aircraft and their crew has the potential to be more difficult, and that the foreign authority has little incentive to be proactive, or even particularly responsive.