The Thick of It was a wonderful piece of TV political satire. In the Loop takes many of the same characters and manages, unusually, to be a laugh-out-loud movie, and, more unusually, to benefit from being allowed out from behind the small screen.
Writer Armando Iannucci is savvy enough not to pin down the subject matter of the film to the war in Iraq and that dodgy dossier. So it's about a dodgy dossier, a potential war and a secret war committee which has nothing to do with real characters alive or etc.
Go see it. Sensitive Christian readers might want to allow themselves a night in front of real language. Cope.