Virgin Ground Staff - who do they work for?

I was through Glasgow this morning and couldn't help but notice the very hot and sexy Virgin crew dressed in their red uniforms waiting for a domestic connection. I also saw a fair number of Virgin ground staff similary clad if not proportioned who had just depatched the VS071 to Orlando.
This got me thinking, do Virgin just pay Servisair to dress some of their staff in red two days a week for this contract? I mean, VS don't actually have a big staff at Glasgow surely?
Do only Heathrow and Gatwick have in house check in staff with Manchester just Swissport staff in red and Glasgow with Servisair squeezed into a Virgin uniform?
This got me thinking, do Virgin just pay Servisair to dress some of their staff in red two days a week for this contract? I mean, VS don't actually have a big staff at Glasgow surely?
Do only Heathrow and Gatwick have in house check in staff with Manchester just Swissport staff in red and Glasgow with Servisair squeezed into a Virgin uniform?