'I never thought for a moment he would take his own life'

An NHS mental health trust is working with US researchers to develop an app that may stop people from killing themselves.

Rebecca Gibson's husband, Andy, took his own life in October 2014.

Andy, who was 54, killed himself at the school where he worked as a premises manager.

Rebecca and her two sons live in Prescot, Merseyside.

She spoke to the BBC's Michael Buchanan.