Unscrupulous landlords are getting millions of pounds from the taxpayer for housing people in cramped and poor quality accommodation. These housing benefit kings make big profits from the system, while their tenants live very different lives. Reporte... (more)r Alys Harte investigates some of the offenders - including the slum landlord who had 40 people living in one house and the businessman who hides his properties behind front companies and false names.