"BTW, many a great poet/composer took influence from English traditional song. Where do you think Coleridge, Keats, Wordsworth got their inspiration? Vaughan Williams, Butterworth, Elgar, Britten etc"

Wordsworth got his inspiration from many things including daffodils, your post muddies the waters Britten used traditional tunes but did not set any lyrics of any merit to traditional music, mind you Bob Dylans Dream is a forgettable piece of lightweight plagiaristic poppycock.