It's Mothering Sunday here in the UK tomorrow. I've been thinking not only about my mother, and both my lovely step-mother and mother-in-law, but also of the children who will not have their mother with them tomorrow. My heart goes out to Natasha Richardson's boys who must be devastated by the loss of their mother. My brother was about the same age when our mother died; my sister and I were 17 and 21 respectively. The trauma of such a loss and its effects on a family cannot be described. Prince William said in an interview the other day how much he dreads Mother's Day, and I know just what he means - I still miss my mother terribly, and not a day goes by when I don't think about her. She was such an inspiration, and a wonderful mum who could turn her hand to anything. I have treasured memories of us painting together - she encouraged me with my drawing and story telling. She was a wonder with a needle - I remember describing a dress I liked once, and she made it in ...