The original (and definitive I might add) version of The London Waterman is that of Bob Roberts on Songs from Sailing Barges, which is where PB sourced his, at JT likewise (as well her Macrame Beat version of When Gamekeepers Lie Sleeping). I can't be 100% certain but Bellamy featured that particular recording (i.e. Bob Roberts singing TLW) in his Folk Quiz at Durham in 1993. If you can't find them (and would like to hear them) frop me a line...