Reporter Roisin McAuley
Latest Police figures show an increase in crimes of domestic violence, unmatched since records began.
One in four assaults is by a man on a wife or girlfriend. In London alone, a thousand battered women ask the police for help each week.
But why is this crime wave in the home allowed to go unchecked? It is a crime like any other say the Police. But despite huge increases in reporting assaults, only three in every hundred gets to trial. Panorama reports on Britain's hidden violent society and investigates how in Canada, the authorities have launched an all out assault on domestic violence. Should Britain learn the lessons?
Producer ROSALND ERSKINE Editor TIM GARDAM