After graduating from the Courtauld Institute of Art in 1973, Halliday continued to do research there into the relationship between Constable and French nineteenth century painting, under the supervision of Anita Brookner. His historical art studies continued later at Oxford University where he received a Doctorate in the History of Art (D.Phil).
Constable never went to France but one of his greatest landscape paintings did. The 'Haywain' was exhibited at the 1824 Paris Salon where it was awarded the gold medal by the King. The painting had a seminal impact on the stylistic development of Delacroix, Bonington, Huet and artists of the Barbizon School who in their turn influenced the French Impressionists.
The painterly quality of Constable's technique with its loose brushwork, rich impasto and textural effects influenced Monet, Sisley and Pissarro, it has also influenced Halliday whose style rejects the marmoreal 'brushless' finishes of the Salon painters.
In 2013 Halliday revisited the location of some of Constable's Sussex pictures and made a series of paintings of Petworth and Tillington in gouache and in oil on canvas, with preparatory drawings made on the spot in chalk on paper.
Halliday now lives and paints in France, south of the Loire Valley, where he is still very aware of the relationship between the English and French schools of landscape painting.