Wycombe
As ten west states Airlines use a variation to the rules to operate to SSH and back. This variation is used also to places such as Luxor, Banjul and other charter flights further away than the standard Palma. The variation allows a 14.15 hr day if reporting after 0800 am. Bear in mind the cabin crew probably report 90 mins before departure and a 767 will take 90 mins to turn round - a long day compensated by pre and post flight rest and restrictions on how many such flights can be done in 28 days etc.
Clearly the reason why charter airlines use it is cost and frequency. Some flights only go once/twice a week the luxury of leaving crew their is costly in terms of hotels, allowances and crew numbers have to be increased. That said some airlines do night stop their crews, if flights are delayed there's little chance of recovery.
BA would never use such a variation, industrial agreements would get in the way. Even Athens they night stop. Many years ago I went LHR-BGI on Concorde the crew got off and stayed their a week. Had a charter airline operated concorde they would have gone round trip for such (about 4 hrs each way)
