Most of the supporting characters are indistinguishable session musos, whom Brent, now a rep as a hygiene products company, pays out of a cashed-up pension fund to play as his band Foregone Conclusion, that name a clue as to the success of his plans to tour his way into a record deal.
So there ain't nothing going on but the Brent. That can get taxing, especially as Gervais originally created him as a character made funny by his middle-management delusions.
Here, Gervais seems to want to make us root for him as an amiable buffoon pursuing his dreams in the only way he knows how - pathetically. And armed with a big bunch of songs that are mostly overlong Gervais gags set to music.
It's fitfully funny though when the mockumentary of old meets last-gasp rockumentary, especially care of Ben Bailey Smith, who plays a guest rapper in Foregone Conclusion and Brent's token black mate. He's a show-stealer both off stage and on - and his delivery of a joke about UB40 is worth half a star by itself.
Movie: David Brent: Life on the Road
Cast: Ricky Gervais, Ben Bailey Smith
Director: Ricky Gervais
Rating: M (offensive language, sexual references, content that may offend)
Running Time: 96 mins
Verdict: The Office meets Spinal Tap, almost.