This is one of those British thrillers that imitates Hollywood and manages to better it in many respects. It's a taut and heavily realistic story of terrorism and a siege, but the emphasis is on realism which means that the gung-ho antics are brief and over very quickly. Personally I like the slow build approach, I think it works very well here, and it makes the climax oh-so-great. Lewis Collins has never been tougher as the SAS agent infiltrating a left-wing group, and everything else just comes together to build an engrossing, highly suspenseful picture. Top marks.