Could it be a song called 'Hunted on the Hillside' ? about pressganging in the Shetlands? If so, it was written by Bobby Tulloch and I have a tape of Cilla Fisher and Artie Trezise singing it and will transcibe it if you think it could be the one. The Chorus is

Why, why can't they let our islands be?
Our men fight hard enough to get their living frae the sea.
Will the day never dawn when their freedon is secure?
It's one law for the rich 'uns and another for the poor.

Cheers.