Facebook’s head of safety, a former FBI agent, has warned people against operating as “undercover” investigators online.

Facebook and the gardaí have teamed to launch an alert system to help locate abducted children.

A British pilot forced by bad weather to abandon her attempt to fly around the world over both poles said today that an Australian aviator stranded at a research station on the Antarctic coast could use fuel she stored there for her trip.

A former music teacher was hoping to enter the record books today as the first solo woman pilot to circumnavigate the world via Australia and the Pacific in the smallest aircraft.