Totally agree with the decision in the grand scale of things he made the right decsion for this reason. As already mentioned derry is a cpt only landing however if it was a heart attack and the cpt wasent breathing would they have allowed him to land?? Even so that could end in disaster. I dont know how long the fo would have been in the company however being ryanair crew and based in STN he would have made 1 or 2 landings a day into STN so would have known it very well. Also STN a base if he had diverted anywhere else apart from a base the aircraft and passengers would have been stranded there. Well done to the FO