Did I write In Our Time started a miniseries The Written World? Well they did and for 24 hours the first two parts were in the feed. Even the third part was there for a couple of minutes, but now, the feed has been cleaned. The series exist, but not in podcast - what a shame. And sorry about sending you on a wild goose chase.
In case you really want to listen, check with In Our Time, The Written World and invoke the BBC iPlayer.