Originally Posted by
Prospero
Think of it this way - A US resident member of the BAEC will have United States registered as their country of residence - this is tied to the main address entered into the membership profile. You can check this by logging onto ba.com
It's entirely possible to be a US and UK resident though, in fact it's very common. For example a London financier who spends 90 days a year in the U.S. office of his bank in New York is legally a US resident but couldn't be excluded as a UK resident.
US courts exist to protect US persons. What address an airline holds for them is irrelevant.