I believe the airline that took over at short notice is experienced in ETOPS, also flying to isolated aerodromes (seychelles), national carrier (LESS likely to go bust), and spare 767 to start tomorrow.i think also the cheapest and most flexible.
they also employ british and european flight deck. Not to mention they employed around 15-20 ex globespan cabin crew.
Aviation is not a charity, and i would imagine HM forces are not one either...they want the job done, and cant compute being let down by other airlines.
unfortunately the world, especially aviation is not covered in milk and honey anymore.
BALPA?...too busy counting their subscription coffers from BA to give a real monkeys.