Even in recession-hit Britain, the gambling industry is still making a profit - £5.6 billion last year. With casino-style gambling now available day or night at the touch of a button in our homes and on our phones, Panorama explores its popularity... and reveals a darker side. Reporter Sophie Raworth hears from those who have found their lives spiralling out of control, and from industry insiders who say violence and frustration, linked to fast-paced high-stake gambling machines, are increasing in our high street betting shops. Panorama goes undercover in some of Britain's bookies to test those claims.