BBC History downloads. These are freely available via Itunes: interviews about The Time Traveller's Guide to Elizabethan England, The Time Traveller's Guide to Medieval England and 1415: Henry V's Year of Glory appear under 24 September 2008 (medieval guide), 2 October 2009 (1415), and 1 March 2012 (Elizabethan guide).
Interview with Frank Thadeusz of Der Spiegel (2012). NB Take some of the statements at the start of this with a pinch of salt - I love travelling, although I do not fly; I have never built a bell tower; and I was not 'frustrated after my exams'. I have always been frustrated by the restrictions of history as an academic discipline.