Originally Posted by corporate-wage-slave

If you are lucky, and you get away in the next 30 minutes or so, you should just about make the return if the luggage return is swift. As for moving flights, I can't see BA/EI at DUB being too helpful this evening, but you can but turn on the charm and see where it gets you. If you're on the aircraft now, I'd probably not bother calling BA, though at least in theory you could use the clause 3 of the Conditions of Carriage. If you are minded to call on that, then you are supposed to get a note on your PNR ASAP, though I don't think it is that critical here since your current flight is going to be fully documented.

In your shoes (what happened to HBO?!) I'd be tempted to say "oh stuff it", book a hotel and an Avios ticket tomorrow. Avios availability is wide open.