Originally Posted by
nologic
Can you please interpret this in simpler English as Lon-Bos seems to be one of the sectors.
Is this a more restrictive interpretation/policy for BA than all other Oneworld carriers?
All of the oneworld carriers I checked now require you to book into F class on a BA-marketed flight between London and Boston under the AONEx fares.
Previously you booked into A, but could downgrade to D, E, L or Y (in that order). Not that you would.