"An outstanding accomplishment in late '70s British religious rock opera, this lavishly produced adaptation of Tim Wynde and Solomon Homerton's 'fringe stage sensation' celebrates the life-affirming story of Christ's nativity as told through the eyes of the Innkeeper (played by Wynde)..."
I was hipped to this in the comments section of the AV Club's Gateways to Geekery: Contemporary British Sitcoms (they suggest starting with Peep Show). I'd never even heard of it before, likely because it only ever aired once, on BBC3 (which is one more BBCs than I have), in 2004, although it was released on DVD in November 2007. Essentially, this is a combination of Garth Marenghi's Darkplace and The Mighty Boosh, starring as it does Matt Berry and Richard Ayoade of the former, and Julian Barrett (Howard Moon) of the latter, with Noel Fielding (Vince Noir) in a smaller role too. And Matt Lucas (Little Britain) as God.
Sometimes the music is better than the comedy, but that's not too much of a bad thing in such a brilliant pastiche of 70s rock musicals. There are the metafictional conceits of Darkplace along with the bizarre theatrics of the Boosh (though not quite as bizarre) as well as the musical skill obvious in both shows. Plus large parts of the performance remind me of Grails videos, that strange irony/reverence for 70s psychedelia, and cowbell, just with a more obvious(ly) comedic target.