Wiggy
You do not say if you are cc or flight deck, but the rules applies to ALL, not most ! Get yourself a copy of Flight Crew Orders, or better still the CAA ANO's, and then see if your colleagues are aware of the requirements. I sat in Club a while ago whilst taxying out on an ATL flight listening to a cc dscribe how they had diverted to Stansted yesterday on a back to back, got transport back to LGW by late pm but still checked in for 9 am check in. By my calculation they were way out of duty hours, but their topic was the extra money involved made it all worth while. With the BA system I doubt the Captain was aware of his cc hours.