Latest report says that there are 3 pax & 4 crew still on board & that highjacker is demanding release of some (female?) prisoners in Egypt!
Concerning David Learmont's strange remarks - surely he's aware of the drug smugglers who involved catering truck staff & ground staff in a drug smuggling operation, where drugs were hidden under rear seats by ground staff & taken in & out of airside areas by catering staff, as security was not so stringent for them. That may well be how the bomb was placed on board at Sharm, & you could never assume it couldn't happen in the current situation.
As a retired Capt., I think I would have reacted the same way as the Egypt Air Capt. in that situation. Nowadays, especially operating out of some countries, you just can't be sure.