john
First I want to make it clear that this is not at all between you and me. This particular subject was prone to misunderstanding even in Toulouse. What I have quoted is the answers given by Airbus industry to their own instructor. Now coming to the question itself there was never any doubt that the first timing starts at the detection of engine failure by ECU but as mentioned by Airbus it is not timing but monitoring of N2. This and above 400ft auto relight is the difference in what you say and what was stated earlier. This off course was old but in April 2012 when the subject came up again Airbus while maintaining this earlier explanation gave further brake down of 30 seconds as quoted by OP DES that timing of 30 sec above 400ft starts with Eng Mode sel ignition and by the time you read ECAM 30 secs are almost over. That is why I am looking for something which is crystal clear and without any doubt. However I will get back with either confirmation of your info or some other angle.