Peter Day's World of Business

The relationship between landlord and tenant is an important, often unseen, dynamic that most of us don’t give much thought to. And yet, it's reshaping high streets up and down the country. High rents are blamed for the collapse of so many retailers - they appear unsustainable yet they are the vehicle through which much of our pension wealth is invested. In this programme, Ruth Alexander looks at different models of ownership: from the big financial institutional investors through to the original aristocratic landowner and asks how - in the turmoil created by the rapidly changing retail environment - these landlords are facing up to a new reality. Presenter: Ruth Alexander Producer: Alex Lewis