Skipness One Echo.
We understand why this is being done...(Do you...do we? TBH your explanation is none too clear).
But really what I`m saying is lawyers "over there " project a business blocking scenario & lawyers "over here" for future proofing initiate a way around it & thru it..in this instance entailing a pot of black paint overnight to change a registration prefix with then the next day an OE-dash flying a UK domestic service down from Scotland...bizarre...& as I stated it`s just a folly of legislature for it hasn`t changed any metal on the ground.
BTW Would you agree OE- is an erstwhile "flag of convenience" registry anyway.