This is a gem.
It's not done good box office but may find its place on streaming channels. It won the audience award at Sundance and I can see why because it's the very essence of laugh out loud funny, coupled with truly British feel good.
Executive-produced by most of its cast including stars and writers Tim Key, and Tom Basden, who also wrote and performed the music - a critical role because its about an old Folk Rock duo - Carey Mulligan and director James Griffiths (Bad Sisters).
It's based on a 2007 short (by the same team) and tells the full story of how the aforementioned duo (Mulligan and Baden - called McGwyer and Mortimer) find themselves on a remote Welsh Island playing a gig for a reclusive Lottery winner - Tim Key as Charles.
Key has a ball as the slightly eccentric loner who simply worships McGwyer and Mortimer who had split up a decade earlier because the relationship stepped beyond the music itself.
He's got money to burn and nothing to do so he can fancily fund a one night only reunion. Needless to say not all goes to plan.
The chemistry between the three principal characters is superb: Kooky Charles, curmudgeonly McGwyer and wistful Morrison. Each riff off the other in unexpected ways and the whole is most certainly greater even than its excellent sum of parts.
In essence it's a movie about loneliness. Charles is single and lost in his life. McGwyer, too, is lost in his career and aggressively trying to feed his ego, having essentially 'sold-out'.
Only Morrison (Mulligan) has a sense of balance in her life and carries off her part beautifully and sympathetically.
It's genuinely uproariously funny in places and genuinely touching in others and adds up to a glorious 90 minutes in the cinema that we shared with 6 others. Shame.
