Strange, and bad. After the glories of "If" and "O Lucky Man", Lindsay Anderson's trilogy really hit rock bottom with "Britannia Hospital" [1982]. Despite a stellar cast and a decent soundtrack by the talented Alan Price, the screenplay by David Sherwin was a political manifesto, not entertainment.
Strange and good: Peter Greenaway's bizarrely magnificent "The Draughtsman's Contract" [also 1982, oddly enough].