The "Etihad" S2000 even more confusing than it appears. The operating airline is Darwin Airline. Etihad has now sold its interest in the airline to Adria, so the airline is to be renamed Adria Airways Switzerland.
I think its an Eastern Airways service, codeshare with flyBe, operated by Darwin Airline in Ethiad colours. But it could be a flyBe device operated by Darwin Airline in Etihad colours, on behalf of Eastern.