Here is the dirty little secret according to Leo!
It didn't expire in 1982, it expired 1984, and in 1983 the BNA kicked in and made him a permanent British citizen, even today as we speak, He has voting rights in the U.K.!!
So as HE says he is a citizen of the WORLD, comes pretty close, because U.K. is also member of E.U.!!!
BHO...hmmmm...hmmmm...hmmmm!!!!
Yep, there was a two year grace period on the expiration.