I've just booked myself a return journey from Arlesey to Blackpool North via Leeds for the middle of June, and from the seat map for reserving on the LNER leg of the journey, it seems I'm booked on Azumas in both directions. So this will be my first experience of the Azumas upon their introduction, unless any last minute substitutions occur.
Interesting to see that the 9-car Azumas introduce another new coach letter configuration, using the following:
A - B - C - G (Shop/Food Bar) - H - J - K (1st) - L (1st) - M (1st)
That'll probably cause a fair amount of confusion for passengers during the early days, as they won't match up with the signs at most of the stations.