If I'm not mistaken Stobart (alias Aer Arann) and Cityflyer never had a common type in this time, the Stobart E190 didn't come until afterwards, so must have purported to have two type ratings on the Embraer jet and the ATR turboprop. All Stobart's fleet, and their AOC, were, I believe, registered in Ireland, not the UK, so wonder what the IAA had to say about this.
May well have flown me once or twice.