Aer Arann used to operate internal flights in Ireland as well as regional flights to the UK and France. They started operating flights for Aer Lingus under the Aer Lingus Regional name in 2012 and the brand was renamed Stobart Air in 2014, which is how they're known now. In 2009, which is the time this particular livery would've been used, Aer Arann had 9 ATR72 aircraft, 5 of which were of the -200 variety and 4 were of the -500 variety.
To install, drag and drop the ATR72-600_AERARANN folder into your community folder.
