Alison, I cannot for the life of me find the song I'm thinking of - neither in my head or the DT, but I'm sure I heard it on Fiona Ritchie's show. It was about the Irish going to Australia and how they pined for the home, trying to fit into a strange land. The refrain was haunting; something to do with green threads among the gold. Maybe there's an idea in it.
I have the great good fortune to be on my way to the beach - perhaps in the quiet it'll come to me!