Mmmmm ...
...I
f I have it right then that is not possible as one is not allowed to move a reg from one aircraft to another. Something to do with maintenance records. ...
Not too sure about the UK atm BUT with most authorities (?) if the aircraft registrations are transferred correctly there is nothing to stop different aircraft have the same registrations (but at different times) .... there are very obvious notations made in the a/c tech logs and maint. records to reflect those changes.