QF1 is currently on the ground in GYD (Baku) after squawking 7700 and diverting there.
According to FR24 it is due to leave about now, so presumably the diversion was medical.
Edit: now reported as a technical issue:
https://www.straitstimes.com/singapo...-in-azerbaijan
“Our flight from Singapore to London has made an unscheduled landing at Baku Airport in Azerbaijan after pilots received an intermittent fault indicator in the cockpit,” said a Qantas spokesman in response to The Straits Times’ queries.
“Engineers will inspect the aircraft prior to it continuing its journey.”