Adam Brockbank is a concept artist, who worked in the production of several mainstream movies, such as Harry Potter & The Chamber of Secrets (among others of the series), Tomb Raider, Alexander and Inkheart.
Unfortunately, there is very few personal information about Adam Brockbank on the web (as far as I could find) and no interviews. But I happened to uncover some background:
Like so many other concept artists, Adam Brockbank first got interested in art through comics, especially Marvel's Silver Age series. Brockbank spent 7 years learning painting, and joined the film industry as a storyboard artist, later working on concept art. 
If you know of any interview or articles about him (with some text and not only his amazing concept art) let me know. Thanks! :)
Here are some of his works: