According to the BBC, there is a musical in the works based on UB40s music:
A musical based around the songs of pop group UB40 will open in their home city of Birmingham next year. Twelve of the band's hits will feature in Promises And Lies, alongside new tracks written for the production. "We wanted to do more than simply string together our hits into a throwaway plot," UB40 said.
...The band collaborated with playwright Jess Walters on the musical, which is due to open at the Birmingham Repertory Theatre in March 2006.
..."It had to have a story that reflected our view of the world," they said.
I cannot imagine what that might be, but I'm guessing it has something to do with reggae.