I was on Beverleys in the sixties.
We'd been stuck in Lagos for a week or so with an engine failure, and we were going to Kinshasa via Douala in Cameroon. Unfortunately, having refuelled, the number four wouldn't start because of a duff starter motor. I explained to the Tower that we'd taxy out on three and get the no4 to start on the roll, and if it didn't start we'd taxy back and shut down.This was baffling to the Tower who hadn't got much English and reluctantly agreed it. Fortunately the No4 started and we were airborne (I didn't use the word 'moulins' ) !