Ive seen on other sites that Egyptair over the winter is not bookable.
It will still run, this happens every season, in that the flights are not bookable until fairly later on.
This is because MS have to re-apply for the licence every season, as their current CAI-UK agreement only covers LHR, and MAN is always granted per season on a temporary licence. I have no idea why this is the case, and MS are working to get it made permanent, as they are aware that they are loosing bookings in the 'down time', but, they are unwilling to take bookings for flights until the licence is granted, just incase its ever denied for ay reason.