Flying to Tenerife on December 12th last year with Ryanair I woke up from dozing off. We were about an hour from.landing when I heard " Number one to flight deck" repeated twice and the crew hot footing it to the front of the plane. I said to the woman on my row, "We've got a problem" she looked at my like I was mad. Like the rest of the passengers she was oblivious something was wrong. Sure enough the captain came on the tannoy to tell us we were going to have to make an emergency landing in Faro in twenty minute as we had a problem with the port engine. We came down with a hell of a bump, the good engine screeching and emergency services racing alongside. I was at the back and could smell the rubber of the tyres burning. Obviously we were okay. The crazy thing was as we landed and got internet connection we were the main headline of the sun online. No idea how they got the story that quickly.
There seems to be more of these diversions due to engine problems than there used to be.