Mark E Smith gave his band carte blanche to come up with a tune on their own some time in 2003. The result is a genius track Portugal.
I remember John Peel (I think) playing it a fair bit and that I was disappointed it wasn't on any release I could find. Tom Robinson played it tonight - it's the last (unlisted) song here, with an excerpt of Tom's interview with MES preceeding it.
I tracked it down in my collection as it's on the American version of The Real New Fall LP Formerly Country On The Click from 2003.