Does this answer your questions?
https://www.caa.co.uk/General-aviati...-requirements/
Here is the soporific version:
https://www.easa.europa.eu/system/fi...u/Part-FCL.pdf
Article 11 of Regulation (EC) 216/2008 reads:
Recognition of certificates
1. Member States shall, without further technical requirements or evaluation, recognise certificates issued in accordance with this Regulation. ...