Hi, nothing specific about your company, but with Manch in general, be aware of the travelling time after getting to the airport. Allow time for parking up your car (if thats how you will commute) in one of the remote carparks, then getting a shuttle bus to the terminal. It can add a good 30 mins to the journey time. I have several mates who are based at MAN.
Hope that helps a bit.
Cheers
WM