Hello Mr Purley,
Many, many, years have passed since we worked together, after GK I moved across to Operations but always worked in the sort of company whereas as an Ops person I found myself involved in Crewing, many years later I found myself setting up and managing a Crewing Dept. from scratch, having previously worked with UK, FAA, Australian & Dutch regulations I then had to write our own company regulations, that was quite a challenge to try and pre-empt every eventually but once written it's not the kind of thing that one can easily forget!
One has to presume that fastone's times are GMT as one can't believe that a Crewing Dept. could be otherwise so stupid, perhaps that Dept. have already reacted to his/her roster disruption unbeknown to him/her but there should be some responsibility upon the individual crew member to understand the regulations and bring it to the attention of the Crewing Dept. although it always helps if the Crewing Dept. is one step ahead of the crew member by maintaining legality without being prompted
PF