John Cantlie: Father appeals for UK hostage's release

The father of the British journalist John Cantlie who is being held hostage by Islamic State militants, has made a direct appeal to his son's captors asking for his release.

Paul Cantlie, who is ill in hospital and struggles to speak, says he has been trying to send messages to Islamic state but has heard nothing back.

He says his family felt "despair and helplessness" when they saw him for the first time in two years on the militants' propaganda video.

Paul Wood reports.