When they have had people from different faiths, they do offer the appropriate religious book instead of the Bible. In part, I assume that they give the bible etc automatically because it removed the most likely book that a fair number (but probably diminishing number since 1943) of people would choose.
No, Martin didn't mention Swarb, or indeed Steeleye Span, The Imagined Village or Brass Monkey. But it's only 45 minutes!

What about lobbying for some more folkies - Ralph McTell, Maddy Prior, Norma, Eliza .....
Derek