Why is it so hard to go undercover?

Last week Panorama went undercover inside a hospital for vulnerable adults and revealed patients being mocked, taunted and intimidated by abusive staff. In shocking footage, reporter Olivia Davies filmed patients with autism and learning disabilities being deliberately provoked by staff and regularly physically restrained by them. The investigation comes eight years after her colleague Joe Plomin exposed the scandal of abuse at Winterbourne View, another specialist hospital. Then, the government promised to reform care for the most vulnerable. We spoke to them both about the challenges of going undercover and who we should blame when the system fails people.

Producer: Lucy Hancock Mixed by Weidong Lin Editor: John Shields