Thanks for that Dave! Googled "harlevin welsh legend bluebeard" didn't find anything. But did find a listing of a tale called "Luala" which Heidi Anne Heiner on Surlalune fairy tales lists as "from Wales". There is no online version due to copyright restrictions. Searching for "Bluebeard legend Brittany" just turns up the stuff I found before on CTA and de Rais. BTW, can you remember anything of the BBC Radio play's plot? That might help better.