This morning this programme (45 minutes) was on BBC Radio 4.

In Our Time: the Neutrino
 
http://www.bbc.co.uk/programmes/b0106tjc0

Melvyn Bragg and his guests discuss the neutrino.

      with:

      Frank Close, Professor of Physics at Exeter College at the University of Oxford

      Susan Cartwright, Senior Lecturer in Particle Physics and Astrophysics at the University of Sheffield

      David Wark, Professor of Particle Physics at Imperial College, London, and the Rutherford Appleton Laboratory.

                          Highly recommended.