In the year since US President Donald Trump announced plans to build a new ballroom at the White House, the proposals have grown to include a rooftop "drone port", an underground hospital and "top secret" military facilities - and the estimated price has doubled to $400m (£300m).

The BBC, the U.K. public broadcaster, is doing well and remains trusted despite much debate and recent scandals. That was among the messages shared by BBC editorial director Rhodri Talfan Davies at the Enders TMT Leaders Live conference in London on Thursday.