Newsnight - 07/04/2010

In-depth investigation and analysis of the stories behind the day's headlines with Jeremy Paxman. A new type of key voter, known as Motorway Man, has been identified by Tory strategists plotting to win the general election. As part of Newsnight's general election coverage, Stephen Smith has decamped to Donington Park services on the M1 motorway to meet the men and women who could have a big say in the outcome of the May 6 poll.