McGrath,
I agree with Alison, unless it's in the DT, in which case point us all to it.
Just heard a great parody of Ralph McTell's "Streets of London", at tonite's sess. I can remember (vaguely)

" How can you tell me that you're only
here for the beer and the wine;
Let me take you by the throat,
if you try to sing "The streets of London"
Maybe a thumpin'
Will make you change your mind.
The verses were even more apt; I'll try to track down the whole set, and post.
Rob