I lived more than 2 hours from my base. My employers made no requirements but as Professional pilot, who was to be the only other pilot on board, I felt that it was my DUTY to be fit for the flight. (I held a CPL and I/R with the type rating in Group 2.)
I stayed at a local hotel, prior to my flights, at my own expense. I was woken by the Manager who told me that my flight was cancelled... the aircraft had crashed.
This was Hermes G-AHDJ at Blackbushe. 7 of the 80 on board were killed. The Captain's Voyage report, which was recovered, mentioned Crew Fatigue.
A few months later Parliament brought in the first Mandatory FTL.