Latest: US doctor offering to treat Charlie Gard could examine sick baby in London

Latest: An American doctor has told the UK's High Court he thinks an experimental treatment being suggested for Charlie Gard is worth trying.

Update 7:26pm: An American doctor offering to treat Charlie Gard might travel to London to examine the terminally-ill baby.

News of the possible visit emerged as Charlie's parents mounted the latest round of a legal battle at a hearing in the Family Division of the High Court in London.