Originally Posted by
Globaliser
I can't see any current O class fares to ACC. So if BA was prepared to make a change yesterday to another O class fare and only charge you £20 extra (plus change fee), then my understanding of the way that the fare rules work may be wrong.
You still know more than me though.

Anyway, I tried the dummy change again and changing both flights will cost 140 (100 +20 each way). I had anticipated 120 each way so it's still a small price to pay (IMO) if necessary. Though we all agree its the availability that's uncertain.