I am so sad this is driving me mad... I even emailed Sainsburys. The actress is called Rosina Carvone but it is driving me nuts as I can't remember what other programme I've seen her in.
The actress is actually called Rosina Cabone not Carvone. she used to be my Drama teacher at school ten years ago. she is lovely. when I saw the advert I knew I recognised her from somewhere and been trying to confirm its her for weeks. If you type Rosina Cavone into Google her actors resume comes up and its on there that she is in the advert