Oh wow, I never thought I'd see fanart devoted to this! I've been listening to A Light on The Road to Woodstock for years (on cassette no less) and had no idea there were other novels, let alone a television series(!)- but I recognised the name right away! This is just really cool.
I managed to watch one episode while I was visiting my parents (the library in their town has all of them) and I really liked it! It was the episode based off of "A Morbid Taste for Bones". You're right, Cadfael really IS a boss (and yet so humble about it).