‘Billy Liar’ has often been described as one of the defining British kitchen-sink dramas of the 1960s, but there is also something of Walter Mitty about it. Tom Courtenay plays Billy Fisher, an undertaker’s clerk trapped in a dead-end Yorkshire job who spends much of his life escaping into elaborate fantasies in which he is important, admired and successful. The tragedy of Billy, though, is that he mistakes his problems for being geographical rather than psychological. He convinces himself that if only he can leave Yorkshire for London, everything will somehow fall into place. The reality is that his inability to act is far deeper than simply where he happens to live.

Billy lives almost entirely in the realm of imagination. He dreams of becoming a comedy writer for the famous entertainer Danny Boon (Leslie Randall) and mistakes passing encouragement for the certainty of a glittering career. Like so many dreamers, he confuses possibility with inevitability, never quite appreciating that aspiration alone is not enough. His plans never progress beyond daydreams.

The same indecision defines his relationships. Remarkably, Billy has managed to become engaged to two different women, neither of whom knows about the other. Barbara (Helen Fraser) represents the conventional future: respectable, well-mannered and hoping for marriage, family life and traditional values. She believes in stability and propriety, but we instinctively sense that Billy could never sustain such a life. Rita (Gwendolyn Watts), by contrast, is outspoken, combative and unwilling to tolerate his evasions, yet Billy is equally incapable of coping with her strength of character.

Then there is Julie Christie’s wonderful performance as Liz, perhaps the most fascinating character in the film. Like Billy, she is a free spirit who drifts through life without entirely knowing where she belongs. She seems to believe that London offers endless opportunities and that the future can simply begin by catching a midnight train. Yet while Liz possesses the courage to leave and embrace uncertainty, Billy does not. She recognizes his fantasies for what they are, but also sees something attractive in his restless imagination. Even so, one suspects that two such untethered souls could never realistically build a stable life together.

I’ve always found it fascinating that director John Schlesinger moved from British kitchen-sink dramas such as ‘Billy Liar’ and his debut film ‘A Kind of Loving’ to films like ‘Midnight Cowboy’, ‘Marathon Man’ and later thrillers including ‘Pacific Heights’. In many ways, ‘Billy Liar’ anticipates ‘Midnight Cowboy’. Both films expose the gulf between dreams of reinvention and the harsher realities awaiting those who pursue them. In America, Joe Buck (Jon Voight) imagines New York as a place where fortunes are made overnight. Billy imagines London in exactly the same way. Both discover that escape is far more elusive than they had imagined.

The ending remains one of the most quietly devastating in British cinema. Billy is finally presented with exactly the opportunity he has spent the entire film longing for. Liz is waiting for him at the railway station, ready to leave everything behind. Yet when Billy steps away to buy a couple of cartons of milk, he simply cannot make himself return. He literally bottles it. Liz departs without him, while Billy wanders back towards the life he has spent the whole film trying to escape.

It is an extraordinary ending because nothing external prevents him from leaving. The only barrier is Billy himself. His imagination remains vibrant, populated by marching armies and heroic fantasies, but those inner worlds have become a substitute for action rather than a catalyst for it. His dreams ultimately imprison him instead of setting him free.

The film also captures Britain at a fascinating historical moment. The old certainties represented by Billy’s parents and the pre-war generation are beginning to crumble, while a more modern, liberated society is struggling to emerge. Buildings are coming down, attitudes are changing and the winds of social transformation are unmistakable. Yet Billy himself remains caught between those two worlds, unable either to embrace tradition or to commit himself fully to the future.

Ultimately, ‘Billy Liar’ is a film about paralysis. It understands that the hardest journeys are often not geographical but psychological. Billy longs to escape, but only within the safety of his imagination. The real world, with all its uncertainty and risk, proves too frightening. The result is both deeply moving and quietly heartbreaking: a portrait of a young man who mistakes fantasy for freedom and discovers, too late, that the greatest prison is the one we create for ourselves.