Depends what you mean by evidence Rob. I have a working knowledge of the way gogglebox programmes are commissioned from knowing people who ply their trade in the medium. Saying it was 'badly done' makes no sense when compared to similar television output. It wasn't a major 12 part series called The History of English Folk Music and pre-sold to Commonwealth broadcasters and the States and sponsored by National Geographic and Microsoft, it was a light-hearted Christmas special with a lightly ironic traditional theme and setting.

As LDT points out the carols are probably the biggest turn off for a folk audience with enlightenment / roundhead / digger sensibilities, which is a working majority. I like hearing carols but then I'm sufficiently interested to record them being sung well and badly by all kinds of people. Those people who are exercised at being somehow misrepresented are barking up the wrong tree IMHO. I still fail to see how someone liking Ralph McTell is a barometer of anything.