My nan used to play the piano in various pubs in Marylebone. There was one called the Olive branch inthe 70's and 80's, and 2 men used to sing this. I will have to see if we have any old cassette tapes (they were the olden days after all) and listen again. I remember at the end, they would sing 'that's the end of all this, now don't take the piss, we are the brothers Malon'