Definately sounds like the charter shopping guide. I flew MAN-LHR on Saturday and had a different shopping guide than normal which figured as the aircraft had just arrived (2 hours late) from a charter somewhere. The crew did say that they rushed the turnaround due to the long delay and didn't have time to change the aircraft back for scheduled operations. The plus side to all of this is that the catering was a little mixed up and I got a cheese toastie at 5pm ^ Even better it was my second of the day