The English Minstrelsie in the same series is much more interesting from a folk point of view. There are 8 volumes and most of them contain songs from the editor, Baring Gould's collection plus some excellent notes on the songs and the singers. 2 volumes are currently going cheap in Philip Martin's music book shop in York. I need vols 1-3 to complete my own set.

Scottish Students SB, also The British Students Song Book which is a little scarcer.