“Nothing is stronger than true love,” a young laird says to a headstrong young woman in Michael Powell and Emeric Pressburger’s I Know Where I’m Going! (1945), his voice heard above the sounds of wind and waves. She replies, “No, nothing.”

In his final years Michael Powell mooted the possibility of a Bartók trilogy. He wanted to add to the growing popularity of his work on Bluebeard’s Castle, the deepest of one-act operas, an idea he had previously rejected of filming the lurid "pantomime" The Miraculous Mandarin and, as third instalment, not the earlier ballet The Wooden Prince but a film about the composer’s time in America and his return, after death, to Hungary.

There’s a thread of bright magic running through British cinema, from Powell and Pressburger through Nic Roeg, Derek Jarman and Lynne Ramsay, and it’s wrapped around Jarman’s last home like fisherman’s rope.

The shop assistant turned World War Two Land Army girl Alison Smith, clad in a summer dress on the sabbath, steps through a glade onto a hilltop track above the village of Chillingbourne in Kent. It’s the same road once taken by medieval pilgrims riding to seek blessings or do penance at Thomas Becket’s shrine in Canterbury Cathedral.

Alfred Hitchcock and Michael Powell are, almost certainly, Britain’s greatest directors. Hitchcock was slightly older, and entered the film business earlier; in fact, Powell worked as a stills photographer on Hitchcock’s Champagne and Blackmail, in the late Twenties, shortly before making his own films.

Michael Powell and Emeric Pressburger made a glorious run of movies from The Spy in Black (1939) to The Small Back Room (1949). Yet the duo’s reputation went into steep decline in the 1950s, and they began to encounter difficulty in securing finance for projects. There were no Archers movies at all between The Tales of Hoffmann (1951) and Oh…Rosalinda!! (1955), and both of those "total films" bombed with critics and audiences who were then into realism and violently opposed to exotic spectacles.

Michael Powell fell in love with his celluloid mistress in 1921 when he was 16. It’s a love affair that he’s conducted for 65 years. At 81, he’s not stopped dreaming of getting behind the camera again. At Cannes this year he hinted at plans to make a silent horror film, but he’s reluctant to talk about it.

Ask someone to pick their favourite moment from a film by Martin Scorsese, something defining.

Nobody ever forgets The Red Shoes (1948) because it’s a movie that seems to change the way an audience experiences cinema. A story about a diverse group of individuals collaborating to make art, the film is itself a wonderful example of the process.

In the current reappraisal of Michael Powell and Emeric Pressburger, what to make of the depiction of women in their key films, that striking tribe of Isoldes with chestnut hair and passionate natures?