'Never underestimate the power of a sketchbook'
Sarah considers her sketchbooks and study pages to be one of the most important tools of her trade - alongside good quality drawing and painting materials.
They really are windows in to the mind as well as a place to explore ideas, composition and try out techniques.
Not every page is developed into a painting and the sketchbooks are also used as a teaching resource.
Sketches are often started in the field, drawing and making colour notes from life, then completed in the studio.
Please click on an image to view the gallery.
All images are protected by copyright and must not be copied or reproduced in any way.