Do you know of any places (excluding the crap BBCidon’twanttoknowafteramonthplayer) where I can download all of the previous series as a podcast player compatible (Podkeeper for Android) format?

Dumb question, but given that they were produced by the BBC why are you expecting them to be available elsewhere? This implies that they have been copied and converted which must mean that the copyright has been broken.

The Beeb might have changed some of it’s rules on the month thing (for some stuff). I subscribe to quite a few BBC podcasts for R4 programmes and you can go months, even years back if you want (great lives, costing the earth, thinking aloud, infinite monkey cage etc etc).

Youtube is your friend on this, plus a youtube to mp3 converter.