1 in Northern UK, Portugal and south of Italy
Logical maybe. Politically acceptable - certainly not.
The French have a larger Atlantic frontage than the Portuguese. They would also expect to have a Mediterranean presence too.
The Alboran Sea is particularly sensitive and I cannot see the Spanish accepting Portuguese based MPA operating in their own back yard.
The east Med also requires some attention especially with Indian Ocean states operating out of area.
Then remember the Russian merchant vessel that went missing.