Funny. I was about to post the lyrics when I found this thread. I'll just tell you that the song is also performed by Cor Cochion Caerdydd - Cardiff Reds Choir; they have a site but I don't remember the address now - just go to www.billybragg.co.uk and get the link there.
It gets confusing if one discussion is split into two threads. Andy Barnes originally called his song "The Last of the Great Whales," but it is now generally known as "The Last Leviathan." There's another, longer thread on that topic that is currently active. To avoid confusion, Thanks.