Yields must be satifactory or else this move does not make sense.
Other airline's yields Mickeyman, other people's will suffer as Emirates can drive down costs due to the high number of seats on a very modern aeroplane. This has nothing to do with Heathrow, as has been stated many times, no one douobts the regions can support long haul so long as they hub at the non UK end.
Can we stop wittering on about First please? There's barely a market in London anymore never mind Manchester....