There are a series of podcasts at
Watching the Directors, the latest of which is about Michael Powell and Emeric Pressburger, The Archers
It's now been "broadcast" and makes interesting listening.
Click on where it says Direct download: WTD42_MichaelPowell_stereo.mp3
It runs for 1hr 40 so settle back in a comfy chair.
They occasionally wander a bit at the beginning as they're settling down. But once they get into the subject it's very good and they make some interesting comparisons with other films.
The people talking are all very knowledgeable about films in general, but not so much so about The Archers. They've watched all the films they can get hold of and they are discussing them and sharing information about them, with each other and with the audience.
It got a bit scrappy towards the end again because there were quite a few of the early and later films that they couldn't find so couldn't really comment on.
But I think it's well worth listening to.
Steve