Perhaps prejudice is too strong a word but you don't explain what you are about very clearly.

As for contradiction, in what sense do Arthur Sullivan and The Northern Sinfonia have a connection with folk. Perhaps it's just that I haven't heard of TNS. Is it a folk group?

This is also compounded by your statement, 'is as traditional as it gets'. I'm just a little bemused and confused; I'm not trying to be picky.