Why are we ageist?

We look at how many employers still base decisions on a person's age, despite the strong pressures in higher income countries to retain and encourage older staff. What are the underlying reasons for this prejudice? And Ed meets a cosmetic doctor at a central London clinic to discuss the increase in demand for anti-ageing procedures, for people who want to look younger at work.Presenter: Ed Butler Producer: Amber Mehmood(Picture: A man and a woman sit at a table at work, with a woman standing up talking to them. Credit: Getty Images)