I can't think of any references to homosexuality in British and Irish traditional song.

Willie O' Winesberrie says "If I were a woman as I am a man, my bedfellow he would have been." This is a rare example of one man (indeed a father) acknowledging the good looks of another but there is no hint of homosexulaity or bisexuality in the statement.

The transvestite highwayman and sailor songs of the last couple of centuries usually centered around a woman following her man. Sylvie, I Am A Maid That Sleeps In Love and Jackie Munro are all good examples. In the Handsome Cabin Boy "It was the Captain found out the secret of the handsome cabin boy."

Then, of course, there was Hannah Snell who was said to have been a Royal Marine for 15 years and to have been punished by bareback lashing - yes, bareback lashing. I would doubt that Ms. Snell was much interested in menfolk... but no traditional song survives about her and I doubt there ever was one.

All the best,
Dan