I have managed to find out about the Matzo Flour. It's actually Matzo Meal and used mainly for the large Jewish community in the area when they have I think he said Pass Over, but don't hold me to it.
Anyway, they simply dust the fish in flour then in egg yolk and then into the Matzo Meal before frying until golden. It produces as he described, a finish similar to a KFC crumb. They serve this in the restaurant regularly and in the take-away when the Jewish event takes place.
I also asked about his secret home made batter which they lay claim to on their website. Well the secret is out, they do make it on site and to their own recipe but it is a mix of of two different pre-mix types. :
