Well said FDR 1.
Let's also not forget that the decision to leave EASA was probably made in the first quarter of last year, just as we were entering the first Covid wave and first lockdown when all hell was breaking loose and it was already becoming apparent that a quarter of UK pilot jobs were at risk. The ERG crazies saw a smoke-screen and just went for it. Hardest possible damaging Brexit was all they were after and the CAA and DfT were well aware that this licencing problem would arise but did nothing.
If current trends continue and more and more UK based pilots are required to have EASA licences then the ECJ will continue to have a say in UK domestic affairs as it will be the final arbiter in any dispute between these UK workers and EASA. Another Brexit own goal.