Yes, it is about the spirit of the arrangements. It has been clear that post end of transition, in order to operate under any Air Service Agreements entered into by the UK, an airline will to have a UK entity and has to have a UK AOC. To obtain a UK AOC, the aircraft has to be on the UK register. Although there has been much confusion over Brexity arrangements generally, the CAA has been consulting with airlines and it has been clear for a while that the UK - EU Air Service agreement would probably only cover third and fourth freedoms. This would mean Ryanair would need a UK business (which it has with one aircraft on the G reg). Other airlines have worked this out so no doubt Ryanair are just playing and generally stirring for time whilst there isn't much flying going on. It has been obvious all along that wet leasing in and just continuing as before wasn't part of the CAA's plan as this would just be taking the p*** of the point of having a regulator.