Delayed arrival into AAA, long journey to crew hotel meaning down route rest falling way below required 10 hour ‘Key to Key’.
Crewing phoned to advise of arrival time at hotel so pick up could be adjusted accordingly. Initially told we had achieved 12 hours ‘chocks to chocks’ so not an issue.
Next person insisted the term “key to key’ is defined as arrival at hotel until commencement of next FDP.