Aaargh. Trying to book flights, the system keeps telling me there's an error. Phone up, "oh of course that card won't work - we've cancelled it. We did write and explain that when changing your account we woukd change your debit card". Me "wtf?" (not literally). He seemed to think I was highly unreasonable for expecting to receive the card and activate it before they cancelled my existing one leaving me not only unable to book those flights but also without access to cash for the weekend. Twats.
(I have booked the flights now before lovely and supportive MNetters give suggestions!)