The Oxford Dictionary of National Biography is a website containing biographies of some fifty to sixty thousand people in British history, from 400 BC to today. In order to draw attention to its varied contents, the website has a podcast, Oxford Biographies, that delivers spoken biographies in seven to fifteen minutes. The apparent schedule is to put out one each fortnight.
This is a charming podcast to browse from. It is really of the pick and choose kind. Look your character up in the list and listen. If you really are into biographies, this could be a charming entry and have you look up unexpected figures.
It seems to me, so far, the podcast tries to deliver talks on lesser known people. We won't see the likes of Henry VIII or Winston Churchill, the way they have started. But who knows, this might change.