Thanks for the confirmation about lack of autothrust and the stick pusher inhibition below 500 feet BO0M. I take the point that turboprop operators fly to a lot of less well equipped airports and therefore do this kind of approach all the time. However there are big differences around the world in how much co-pilots are allowed to actually land the aircraft. Obviously they have to learn some time. A few people have made the comment that the simplest solution often turns out to be the right one. In any case it is highly probable that the flight recorders will tell us what really happened relatively soon.