Andriyko

You have to deal with Expedia, unfortunately. BA has specific guidelines for situations like this and if a seat exists in the cabin then it should be given to you. I don't khow how well trained Expedia's agents are but they should have access to these guidelines for travel agents. In a situation like this, the available booking classes should be of no relevance - Expedia should re-book you into whatever is available. The magic words would be to push Expedia to look up BA's policy and to remind them that BA allows booking any available seat when there is a cancelation. Expedia's agent does not even have to talk to BA about it or get the airline's approval.