The development of painting in London from the Second World War to the 1970s has never before been told before as a single narrative. R. B. Kitaj's proposal, made in 1976, that there was a "substantial School of London" was essentially correct but it caused confusion because it implied that there was a movement or stylistic group at work, when in reality no one style could cover the likes of Francis Bacon and also Bridget Riley.

Modernists and Mavericks explores this period based on an exceptionally deep well of firsthand interviews, often unpublished, with such artists as Victor Pasmore, John Craxton, Lucian Freud, Frank Auerbach, Allen Jones, R. B. Kitaj, Euan Uglow, Howard Hodgkin, Terry Frost, Gillian Ayres, Bridget Riley, David Hockney, Frank Bowling, Leon Kossoff, John Hoyland, and Patrick Caulfield. But Martin Gayford also teases out the thread weaving these individual lives together and demonstrates how and why, long after it was officially declared dead, painting lived and thrived in London. Simultaneously aware of the influences of Jackson Pollock, Giacometti, and (through the teaching passed down at the major art school) the traditions of Western art from Piero della Francesca to Picasso and Matisse, the postwar painters were bound by their confidence that this ancient medium could do fresh and marvelous things, and explored in their diverse ways, the possibilities of paint.