Opposition parties rarely lose by-elections - so speculation that Labour could lose in the upcoming contests for Stoke-on-Trent Central or Copeland is unusual. For more on how the battle is unfolding, Share Radio's Ed Bowsher spoke with John Curtice, politics professor at the University of Strathclyde and research consultant to NatCen Social Research.

Guests: John Curtice

Published: Mon 20 February 2017