What if the Americans made a movie of Winston Churchill’s life, prone as they are to re-write World War 2 history to show they won it all by themselves?

This is ostensibly the premise of this spoof from some of the team behind Channel 4’s The Comic Strip. I say ostensibly, because the film is bookended (for padding, I suspect) with scenes that suggest that the real Churchill was an American GI, and the British simply re-wrote history using a somewhat chubby actor called Roy Bubbles. Sadly, the joke was funnier when it was riffing on those US historical re-writes.

The problem with killing that joke is, it’s the best one the film’s got. It’s also just about suitable for a five-minute comedy sketch, or, at a stretch, a series of sketches. The strategy for drawing this out to movie-length seems to have involved those bookends, as well as bunging some outtakes at the end and including a bunch of ridiculous, irritating, and unfunny subplots with Hitler and his entourage. It’s a shame to see the talents of actors such as Antony Sher and Miranda Richardson frittered away on such material.

This is all being a tad harsh, because Churchill actually has its fair share of amusing moments. The supporting cast of British TV comedians are mostly very good, Neve Campbell’s posh English accent (usually such a stumbling block for Americans-as-Brits) is as good as anything a British actress could have delivered, and Christian Slater and Romany Malco make for a likeable pairing. But, again, most of the best bits are of sketch length, and so wind up spread out among the padding.

In that respect it’s quite a shame, because there’s a good idea, good potential, and some good laughs in here.