There is another song on the same subject,which you may hear sung by Ken Hall on the excellent CD "as close as can be" by Peta Webb & Ken Hall (Fellside FECD155).The song is written by Fred McCormick in praise of the noble bacon butty,and contains some splendidly tortuous rhymes;e.g.anguish/sandwich.Transcribing the song is beyond my powers I'm afraid.