Farnish's climb from running a small department for Lewisham Council has been remarkable. After a degree in botany and science, she worked for the Countryside Commission in classy offices overlooking Regent's Park, before taking a career break to bring up her children - Sam, 26, Jack, 24, Harry, 21, and Hannah, 15. Farnish relished her work at Lewisham, running a support team for council members. But when one of her sons was mugged, she and her husband, a management consultant, decided to leave London. They moved to Cambridge where she became deputy chief executive of the city council.