Air Atlanta
Why would Air Atlanta look for crews with an anonymous Email address? Don't think so. Makes no sense what so ever. A large company would do their hiring through a contract agency confidentially with details released to shortlisted candidates.
Air Atlanta does not operate out of LGW or MAN anymore on PAX charters. There are no bases in either city nor any operations offices etc, your info is very old on that part.
Majority of flightcrews are certainly not from UK nor are the Flight Ops people. Hence no UK favours to be played.