Rules Of Engagement

Rules of Engagement......from IMDB: "Political intrigue and murder occurs when the English town of Portsmouth is sealed off by the military during the eve of World War III."
Starring Kenneth Cranham (Shine On Harvey Moon, Danger UXB, El C.I.D., Our Mutual Friend, Rome), Derek Fowlds (Yes Minister, Heartbeat, Affairs of the Heart, Chancer), Anna Calder-Marshall (Bloomers), Cathy Tyson (Band Of Gold, Bonkers, Grange Hill).
http://www.imdb.com/title/tt0344712/