Thanks hillrider. The conditions in the ticket I was looking at also had this text:

// CHANGES AFTER DEPARTURE //
THE ITINERARY MUST BE REPRICED USING FARES
FARES IN EFFECT ON THE PREVIOUS TICKETING DATE.
--------------------------------------------------
WHEN THE NEW ITINERARY RESULTS IN A HIGHER FARE
THE DIFFERENCE WILL BE COLLECTED
--------------------------------------------------
WHEN THE NEW ITINERAY RESULTS IN A LOWER FARE A
REFUND OF THE RESIDUAL AMOUNT WILL BE MADE
--------------------------------------------------

I suppose, I'm just not up to speed on BA legalese. Does this I can get a refund even for a no-show?

Thanks.