Michael Berkeley's guest is the English government historian and political journalist Peter Hennessy. He has written many award-winning books about postwar Britain, most recently Having It So Good, a study of the Macmillan era, and New Protective State: Government, Intelligence and Terrorism. His musical choices reflect nostalgia for his upbringing in 1950s Britain, with pieces such as Vivian Ellis's 'Coronation Scot', the Chris Barber Jazz Band, spiritual works by Bach and Pergolesi, a Beethoven string quartet and the opening of Sibelius's Second Symphony, which reminds him of the Scottish Highlands.