It was also collected/published by Sharp in English Folk Songs vol.2. That is the version Fairport recorded. I don't know which version Maddie recorded - probably the same one? That tune is a straight Major/Ionian with an AABA pattern. The fourth of the scale is weak and only occurs as a passing note in the rising A phrase. The tune can be sung without that passing note in which case it becomes an I/Ly hexatonic scale. I seriously don't trust the Purslow chords for his tune! Sharp also refers to a further three tunes for the song which were published in the Folk Song Society Journal. Can someone give us a clue which version Maddie recorded?