Thelma Barlow (née Pigott) is an English television actress and writer, most famous for her roles as Mavis Wilton in the long-running ITV soap opera Coronation Street and as Dolly Bellfield in the sitcom Dinnerladies. Thelma Barlow was born in Middlesbrough, North Yorkshire, the younger of two daughters. Her father, Tommy, a cabinet maker, died of ...