It's based on the life story of Ian Dury, IMHO the best lyricist/poet who ever got a gig. And Laughter was the best album I ever bought as a teenager. I still have the cassette tape at home, even though the ferrite oxide has long rusted and worn away.
In what could turn out to be a masterful bit of casting, they have Andy Serkis playing Dury in the movie. I can well imagine Serkis doing a great Dury. Having done mega-blockbusters with Peter Jackson, Andy seems to be picking up quite a number of intriguing, not-so-mainstream roles. I guess he can afford to;-)
I also realize there's an obscure connection between Dury and Serkis. Dury is well known for having created and performed a version of the Bus Driver's Prayer, which ends with the line..
For Iver and Iver ... Crouch End
Which is - at least according to wikipedia - where Serkis now lives. So Andy is picking up from where our dear departed Ian Dury (RIP) left off...
OK, so that's a stretch. Time to reminisce over the Blockheads and wait for the movie to come out..