My impression was the questioning (Chris' post) took place at Heathrowcarrie wrote:Yes she did have a return ticket, with Egypt Air, but I was under the impression from Chris's post that the questioning occurred at Luxor arrivals. Perhaps they are flagging all those who don't have a return in the UK and then notifying immigration here in Luxor. She certainly wasn't asked any questions here in Luxor.
Apart from the practicalities, why would Egyptair (and it seems to be just Egyptair) allow someone to board a flight if they felt there was any possiblity of them being refused entry. It's the airline which would bear the consequences.
They are hardly likely to say to Luxor " Hey...have a close look at Mr/Mrs X traveling on a one-way ticket. He/she might not be entirely kosher"

I've yet to hear of anyone arriving in Egypt, and purchasing their $25 visa at the airport, being questioned as to how long they were staying, whether they had a return flight booked etc. etc. If your return ticket was in your hold luggage the immigration officer would have a hard time seeing it!
Surprising....considering all the other hoops we're asked to jump through nowadays