My friend Pam Walker was a social worker who later turned her attention to painting.After starting out at the London borough of Brent in the early 1970s, a decade later Pam went part-time at the London borough of Barnet so that she could pursue her artistic interests. Working mainly in acrylics and collage, she took as her principal subjects urban landscapes undergoing change, although she also focused on the beaches of the south coast of England, where she went walking with her sketchbooks. Con