Further to my post of last year it seems there is
another part of the USA which will forever be British!
The land was leased to the Commonwealth War Graves
Commission, which keeps track of and maintains all graves
of soldiers who died in either of the two World Wars. And
since it was granted ‘in perpetuity’, this memorial and
gravesite in North Carolina will forever be considered British soil.
http://www.bbc.com/travel/story/20190714-the-us-land-forever-leased-to-britain