Well here's another version of how the ECJ complication could play out:
The Government is exploring Article 66 of EASA regulations, which establishes a clear legal route for third-party country participation.
In a future scenario where the UK is an associate member, a domestic dispute over the application of safety regulation would be under the jurisdiction of UK courts.
However, under Article 50 of the same EASA rules, the European Court of Justice (ECJ) is the ultimate arbiter of EASA rulings.
Norway and Switzerland have joint committees to allow that jurisdiction to operate indirectly, but it still exists.
Some Brexiteer MPs may feel that such jurisdiction oversteps or blurs the Prime Minister's much-heralded "red line" of no ECJ jurisdiction after Brexit.
https://news.sky.com/story/govt-to-s...-line-11151049