I confess a small amount of bias in rating this movie, as much of it is set in London and East Anglia, where I used to live. As such, its various scenes of Michael Caine at the 'coal face', closing in on Pierce Brosnan's Soviet agent, feel extremely grounded and visceral. I love the scene where Caine and Matthew Marsh are busy throwing a Ford Transit across the Suffolk suburbs and Caine asks worriedly 'who signed for this van?!' Marsh, concentrating on avoiding cars and pedestrians, smirks and replies 'you did'.
The story is a cracker, based on Frederick Forsyth's novel of the same title. The screenplay, also written by Forsyth, keeps its characters very 3 dimensional, even the minority players. The actors deliver polished performances across the board and it's all directed with competence and grip by John Mackenzie. As a result, the whole movie feels both taut and authentic. It think it stays fairly true to the ways and means of the security services of the eighties.
My only gripe is with the very final couple of minutes, where Caine confronts his puppet masters in a slightly leary scene that jars with the rest of the movie's tone. Otherwise, this is as good a spy movie as you could want. Go watch it, if you haven't already!