Jon - the question was asked and I am just trying to be fair and find an answer - there is no ulterior motive here

I was particularly interested on the "CULTURAL" aspect of the question as, even in my own folk club, there is a definite blurring of the edges for traditional folk/contempory folk/blues/county songs/gospel songs/hymns, all of which are acceptable to sing

Yes,Kat - I did try to bring up the threads but was 'timed out' before I got a result - I presumed there were just too many for the search engine to cope with.
If you think it's all been said and don't wish to comment - thats no problem at all - I will just have to make up my own mind