First great job, I guess all the UK CAA license holder will appreciate your determination.
To fuel your next fight to get all the derogations which have been recently implemented across the channel, France has approved on may the 14th a similar derogation with the extension to third country type rating.
National differences from the original FCL-EASA :
Dérogations nationales au réglement européen AIRCREW - Ministère du Développement durable
Page non trouvée - Ministère du Développement durable
it's in french unfortunately
It's now possible like it was before on our FCL ATPL to renew our type rating + IR restricted to the A/C registered in the third country we operate, providing the original IR training and check was done in a FCL FTO.
Our French ATPL FCL, are now open for EASA conversion based on the same rule.
I really hope for you guys that your CAA will look at the problem in the same our did.
It sadly seems sometimes that more EU integration means more disintegration !
Good luck