I believe Alba pay
just short of what aviance do - though I stand to be corrected - though both of which are considerably more than Servisair having spoken a couple of their dispatchers! Menzies I believe are the highest payers in GLA though. aviance are likely to be taking on in the next couple of months as well for the BA contract as there are staff expected to head off to pastures new.
Personal experience of both BE and Y2 would suggest that neither will stump up for staff travel, though I believe one or two of the GH's have arrangements with Expedia Corporate as well as the more common Touchdown Holidays, though I've not seen Alba's name mentioned with either.
You can but give it a go