Liz Smith, once called the nation's favourite fictional grandmother, is a familiar face to all TV and cinema viewers She is most often recognised for her role of Nana in The Royle Family Our Betty is Liz's life story - from her cosseted yet lonely childhood with her beloved grandparents (her mother died giving birth to Liz's stillborn sibling), through the war with the WRENS, marriage and children, divorce and poverty, long years working in dead-end jobs such as in a plastic bag factory, until her heavenly escape of evening acting classes provided the chance for a career