Still on the "Prime Ministers series" --
Brief clip
http://youtube.com/watch?v=rQ-M0KEFm9I
An (unfortunately edited) PM question with Margaret Thatcher.
It "takes off" after 1 min or so. Towards the end, look for the question by the LII Tony Benn.
http://youtube.com/watch?v=U2f8nYMCO2I
http://youtube.com/watch?v=1aZdAyHVjzQ&feature=related