In his current stand-up show, Al Murray performs a routine on prime ministers past.
By the time he gets beyond Callaghan, he finds that almost everyone in the audience has glazed over and no longer has any idea who he is talking about.
And so the BBC's deputy political editor James Landale has written a poem to help remember prime ministers of the 20th Century.
Al Murray guest-edited BBC Radio 4's Today Programme on Tuesday 1 January 2013.
Get in touch with Today via
or text us on 84844.