Follow-up: only option offered by Executive Club was cancellation of ticket with full refund of Avios/taxes/fees. This was notified less than 4 days prior to originally ticketed departure flight despite previous assurances from BA over each of the last 4 days that they would find a solution. Was told to follow-up with Customer Relations regarding further compensation/EC261. Can’t wait to hear what their response will be a month from now.

Lesson learned: buyer beware when redeeming BA Avios for IB flights online. BA apparently feels no obligation to uphold their end of the Conditions of Carriage.

-FlyerBeek