Perhaps a look at the press helped?
Not really, since that excuse-for-an-article was posted two hours after qantas330 asked his question. "There are no further details" seems to be BBC journalist talk for '"it's Saturday night and I'm having a carry-out".
Rather more useful report here, from several thousand miles away. Imagine actually contacting the passengers to find-out what happened! Such pro-active journalism. Perhaps they could run a course for BBC journos?
United Airlines Flight Diverts to Belfast, Passengers Sleep on Floor - NBC News
"At one point the crew were serving ice creams and sorbets to passengers. We were taxying out to leave, refueled, we were on the main runway - then the captain announced it was two minutes over the time they could do time in cockpit due to federal work regulations. People thought he was joking."
https://mobile.twitter.com/therobore...855680/photo/1