History of the World in 100 objects:
http://www.bbc.co.uk/podcasts/series/ahow
In particular number 19 'The Mold Gold Cape', a piece of really flashy Bronze Age clothing; and number 28 'The Basse Yutz Flagons' which are some stupendously decorated Celtic vessels. The series is ongoing so there may well be more of relevance to Dumnonni.

In Our Time:
http://www.bbc.co.uk/programmes/b006qykl

This website contains over 450 programmes of informed chat about a vast range of historical, cultural and philosophical topics; particular relevance to Dumnonni:

Merlin - http://www.bbc.co.uk/programmes/p003k9j2
Alfred and the Vikings - http://www.bbc.co.uk/programmes/p003k9gm
Norse Gods - http://www.bbc.co.uk/programmes/p004y243
The Celts - http://www.bbc.co.uk/programmes/p0054894