In a slightly shorter version of the Polling Matters podcast (14 mins 23 secs) Keiran discusses the exit poll with Professor John Curtice. We discuss how it was done and how Professor Curtice felt when he realised it was about to say something very different to what the opinion polls had said.

Keiran Pedley is an Associate Director at GfK NOP and tweets about polling and politics in a personal capacity at @keiranpedley