I don't think quote ping pong is going to add much clarity to the subject. The CAA advice in Pink 68 seems to indicate that they are keen to get the message across that pilots should not be reluctant to declare an emergency. The CAA also advise that pilots taking the simple step of preventing ambiguity and explicitly a Mayday or Pan and not simply state the problem and assume it is being handled as such. The advice seems to be if in doubt call Mayday and downgrade later if appropriate.
I don't see any sense in over analysing the wording or definitions. Also I would have thought that in the vast majority of situations, a stopped and restarted engine cannot be trusted, in which case you are certainly in imminent danger.