[1] He was selected personally by J. K. Rowling to present colour illustrations of every title in the Harry Potter series.

He attended the University of Westminster at the Harrow Campus, a vantage point for views of London in the smog which had been used by Victorian painters.

[4] His later work as the Assistant Curator for the Illustrations Collection at the Royal Botanic Gardens at Kew brought him into contact with the rich archives from Indian art collections, illustrated manuscripts, herbals and the records from the era of British exploration across the world, in particular the work of Indian artists employed by botanists to produce paintings of local flora.

[4] In 2012, he received his first Kate Greenaway Medal for his illustrations in the book A Monster Calls by Patrick Ness.

On 24 January 2022 Bloomsbury confirmed that the illustrated edition of Harry Potter and the Order of the Phoenix would be released on 11 October.