VS-LHRCSA,
Thanks for the info, it's pretty useful to know. I wasn't having a 'dig' at crew who rested, I really did want to know if some poor souls were nowadays expected to attend to other flights after landing from, say JFK overnight.
It just seems to me that many cabin crew look very tired, and I wondered if this was due to competitive pressures pushing up the working hours, with shorter breaks off duty (actually away from the airport).
I have a great deal of sympathy for those who work on the charters you describe.
I agree with the idea of having fewer crew available during overnight flights, but I often notice that on daytime flights as well, where even in club, getting cabin service can sometimes be tricky.