If it's 737's and the like, it ain't going to be a long flight
Can't a 737 fly 4/5 hrs each way these days? Doesn't that add up to 11.5hrs or more duty including turnaround, through the night? With two pilots, the imapct is greater than your 4 crew ULR trip.
And "an hour or two down the back"... great! ....... all respect Harry but you are a ****ing knob. Are you British as well because so often they seem to think exactly as you do, as do our managers.