In reality my issue isn't with the lack of communication but their inability to handle what, to me, seems to be a frequent occurence of canx flights. From the BA North Lounge we were sent to Central Customer Service (gate 12-13 area) then to gate 21 then through passport control, baggage reclaim, into arrivals then back up to departures - a nice 20 min walk to arrive 100 metres from the Lounge I was in.
Being aware of the much vaunted Architects views of the building as providing a stress free environment I do hope he never has to travel through there and suffer a canx flight.
Once back in the check in area there was absolutely no system - the staff should have had plenty of notice that 1,000 pax were about to descend on them and have been organised accordingly with queues clearly marked instead of the free-for-all that occurred.
Maybe the circumstances are exceptional but twice in 3 visits tells me it's the norm.