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Here is the first part of the last ever episode of Pebble Mill at One. Thanks to Ben Seymour, son of presenter David Seymour, for posting the episode on YouTube.
https://www.facebook.com/BBCArchive/videos/583616358678065/?t=0
Tom Coyne shows the viewers of Nationwide around the brand new Pebble Mill studios in 1971, including TV Studios A and B, and Radio studio 3, the home of The Archers.
This link is to a short video posted by BBC Archive, of Bernard Falk taking a behind the scenes trip round BBC Pebble Mill in 1974.
https://www.facebook.com/BBCArchive/videos/560479220991779/?t=129