The overheated London rental market - how long can the boom last?

Rents for houses and flats in London have risen to record levels, as landlords pull out of the market following a loss of tax relief and tightening regulation.  There are stories of dozens of disappointed applicants for every property in some areas.  How long can this continue before tenants are simply unable to afford to pay more?  Property commentator Anne Ashworth talks to Winkworth CEO Dominic Agace about the broader trends, and for some tales from the front line we hear from Rupal Patel, director of Winkworth Shepherds Bush, and Adam Stone, lettings manager at Winkworth City and Clerkenwell.