They call it "the knock" - when the police are at the door and demand to take away laptops and phones to search for evidence of images of child sexual abuse. Our reporter Jo Morris talks to "Emma" (not her real name) about the moment her life was turned upside down when her then husband was accused of looking at indecent images of children. She felt isolated and wasn't given any support to explain to her children about what was happening, once social services had made sure that the children hadn't been directly harmed by their father. She told her younger children that their father's computer had been taken away because it was broken - and was more open with the older children about what he'd done. The family moved house and changed their name once vigilantes became aware of the case and her oldest child had suicidal thoughts and was hospitalised. Emma eventually got support from the charity Children Heard and Seen, which offers face-to-face support to children in Oxford and Birming...