I rather enjoyed it and recommend listening.
It was three well-respected academics talking largely about ancient Druidry, with a little bit about the revival in the 17th Century with Melvyn Bragg. The best part was Barry Cunliffe explaining, in words of relatively few syllables, to Bragg that the Druids as we know them were not there when Stonehenge was built but that they are the, essentially direct, descendants of the priestly class that was around when it was built. They had a slightly different perspective from Ronald Hutton, but one that could be resolved by discussion rather than disputation.
May the long time sun shine upon you,
All love surround you,
And the pure light within you,
Guide your way on.