I have a weekly class in Surbiton, and I teach CBP and Chinese Calligraphy privately at my studio in Surrey, near Kingston-upon-Thames (KT18).
Chinese Brush Painting uses unique materials: the paper, brush and ink are all specific to CBP, and have special properties. The materials are not expensive: the ink and brushes last a long time, and you can use cheap paper to practice. You can find out more about the materials here: Getting Started.
To find out about learning Chinese Brush Painting in other areas, and about Chinese Brush Painters in the UK, contact the Chinese Brush Painters Society: CBPS