I'm not sure I can add anything to what was said on the first page of this topic. To summarise:
You need a UK-issued JAA orCAA licence prior to taking up employment with Virgin.
It would seem to be acceptable to apply with a JAA licence issued by another country, but you must get it changed to a UK-issued licence prior to starting employment. (See AERO-DYNAMIK's posts earlier).
Scroggs