Professor David Spiegelhalter, Winton Professor of the Public Understanding of Risk at the University of Cambridge delivers a public lecture at Madingley Hall on 3 May 2011.

The lecture is chaired by Professor John Rallison, Pro-Vice-Chancellor for Education at Cambridge, and introduced by Dr Rebecca Lingwood, Director of Continuing Education.

Please note that the lecture proper begins at the 4:00 minute point in the video.