Originally Posted by
FrancisA
I am a bit surprised that an I fare gave an upgrade to A one-way. Normally BA restricts these promotions to higher class base fares.
My guess is that it's not so much a promotional upgrade as a dual inventory fares. Ba has many T fares that book into I and I fares that book into A (from all departure points) including both limited promotions and recurrent/permanent fares.