I'm going to put my head above the trench first!
Search and Rescue should not recognise International Boundaries.
I know the MCA does many things other than SAR but I personally have no issue with a European Coastguard. The individual nations all work from the same manuals (IAMSAR) and they spend considerable time and money every year on joint exercises and workshops to try and harmonise their plans and procedures.
My Licence says JAA and my Flight Plans go to Eurocontrol. Now if we could just get the CAA abolished with the introduction of EASA.......