'I can never understand how the scribbles of such an ordinary person ... can possibly have value.' So wrote Nella Last in her diary on 2 September 1949. Sixty years on, tens of thousands of people have read and enjoyed the first two volumes of her uniquely detailed and moving diaries, written during World War II and its aftermath as part of the Mass Observation project, and the basis for BAFTA-winning drama Housewife 49 starring Victoria Wood (with...