William Crozier was educated at the Glasgow School of Art (1949-53). On graduating he spent time in Paris and Dublin before settling in London, where he quickly gained great notoriety for his work. By 1960 William Crozier was widely seen as one of the most exciting artists in London. Soho was his habitual haunt with fellow raconteurs William Irvine, Robert MacBryde, Robert Colquhoun, and intermittent comrades Francis Bacon, William Turnbull, and Eduardo Paolozzi. His first solo exhibition was in 1960 at the Drian Gallery, followed by another in 1961, and then three shows in consecutive years from 1962 at Arthur Tooth & Sons.

Profoundly affected by post-war existential philosophy, Crozier consciously allied himself and his work with contemporary European art throughout the 1950s and 1960s, towards painters such as Jean Dubuffet, Pierre Soulages, Hans Hartung and Nicolas de Staël. Extended stays in Paris in 1947, 1950, and 1953 were formational experiences: “To be in Paris then was to be at the centre of the world. Anyone who was not young in 1949 and who did not sit in the Café de Flore or the Deux Magots, where Sartre and Simone de Beauvoir were as gods, simply cannot appreciate the sheer excitement that enveloped the young of Europe emotionally, physically and intellectually.”

Crozier taught at the Bath Academy of Art, the Central School of Art and Design, the Studio School in New York and finally at Winchester School of Art. In 1973 he became an Irish citizen, having been born to Irish parents, and lived between homes in West Cork and Hampshire. In 1991 the Crawford Art Gallery, Cork and the Royal Hibernian Academy, of which he was an honorary member, curated a retrospective of his work. Crozier was awarded the Premio Lissone in Milan and the Oireachtas Gold medal for Painting in Dublin in 1994. A major retrospective in 2017 will take place at the Irish Museum of Modern Art, Dublin.

In 1958, Crozier was lent a cottage in Essex and subsequently divided his time between there and London. For Crozier the bleak empty estuaries and the wilderness of the marshes of Essex was a ravaged landscape which symbolised the torment and fear of the post-war condition at the heart of existentialism. In the introduction to Crozier’s 1961 Drian show, G. M. Butcher wrote, “if there is one thing that Crozier wishes to get across in all his painting, it is a mood of fear, anxiety, unease. This is his personal reaction to the world as it is - where savagery is only just beneath the surface.”

The landscape, particularly seen in the half-light of dusk when forms and colour dissolved, became the source of visceral paintings such as 'Untitled', c. 1960. Instinctive, animated brush strokes of ochre, moss and sea greens, orange, browns and even black, conveys the primitive energy Crozier unearthed in Essex, a darkly animistic union with environment. Butcher continued in his introduction: “There is an anxiety in Crozier’s colour harmonies; there is a suspense in the way his shapes and lines hang beneath one another; there is a pictorial ambiguity in colour-areas which may equally read as sea forms, land forms, space forms.” Areas of sparse whiteness, the priming of the board, temper the profusion of strokes of paint. Directional emphasis is tumultuous: densely built up ripples of black sweep across the canvas, whilst streaks of rich colours stream downwards. Axes on the surface are, however, subsumed by the boldness of Crozier's layering: the gradual accumulation of strokes begets depth, literal and metaphorical.