A Britannia Pilot asked me for descent once and, as he had anticipated my next transmission, I was able to clear him down immeadiately. Minute or so later I noticed that he hadn't begun his descent so I asked him if he was leaving? He replied that he planned to start in another minute or so. It wasn't busy so I asked (politely) why had he requested descent when he wasn't ready?
The rueful reply was "the computer told us to" (years before Little Britain!!!).
