I've spoke to, and messages Egyptair in various formats and have received the following answers, so make of it what you want:
- website glitch, schedule should be back soon
- waiting for clearance from UK authorities, then schedule should be loaded
- route ends on 29th March
- temporary removal, should be back soon
I'm curious as to where passengers stand who have booked on MS services for the following months? I was almost one of them until their flights disappeared from the schedule.