Adrian Johnson's portfolio is diverse, ranging from illustration work for advertising and editorial clients, personal work, and teaming up with animation studios and agencies like Tennant  Studio aka, and BBH to bring his characters to life. His clients have included Disney, The New York Times, The Guardian, Nissan, Sony, The Design Council...
Silvia Baumgart (manager of The Association of Illustrators) summarizes the aesthetics of Johnson's work very well: "...He is indeed very fond of 50s design and illustration and sees his influences there without referring to specific personalities or outlets. His work can be described as collages based on drawings he cuts out from his sketchbooks, potato prints and sometimes photographs he has found. Typography is very much part of the composition and not an element to add on to the image to create meaning. The result is graphic art at its best where the artist acknowledges the medium itself: the shape of the surface within which the image is created, the forms and textures of the elements used to create a composition and the fact that the images is a two-dimensional representation of reality.."

He doesn't include much personal information on his site, but I do know that he is left-handed (like me). His bio by B&A says, "Adrian Johnson reads, thinks, draws stuff, then does the color bit on computer. It's hardly quantum physics."
Most of his clients are UK based, but you may recognize his work from a large Vodafone campaign from last year.