Slot-swaps: OK, yes it is OK for companies to sort out their own aircraft if they wish, but have you considered the impact upon ATC and other companies if the BA767 at FL90 at BNN suddenly is No10 in the sequence instead of No3, so all the other companies' aircraft above him have to be vectored away from the hold and descended to keep their rightful places. Late descents ensue, can cause separation difficulties and generally get in the way. My point in raising it was only to note that, contrary to some points raised hitherto in this thread, the Conc does get preferential treatment, however subtle, more often than other more 'normal' types.
Having said that, it has been interesting to see the detailed explanation of operating it from the inside. I suppose that the fam flight scheme has gone by the board??