Originally Posted by
pgary
Is that three years from the posting of miles, or three years from an activity on the account (like the policies of U.S. based airlines)?
Three years from activity:
12.3. If a Member has not earned or redeemed Mileage for 36 consecutive months, all Mileage that has accrued to that date will expire.
http://www.britishairways.com/travel...s/public/en_us