Why all the anti-Israel remarks? It seems that the crew of a UK-registered aircraft lost situational awareness and entered militarily-sensitive airspace. Interception is a procedure known and understood by all professional pilots. It is obvious that that would take place if there was no radio contact with the controlling authority.
Frankly the Egyptian radar "service" is likely to provide poor control, and one should always be cross-checking position and ground clearance when in their airspace.