Winifred Wimbush (1884-1958) came from a family of artists. She was the daughter of Henry Wimbush (1858-1943) who usually signed his work as H B or Henry B Wimbush and sister of Olive (1901-1985) who was also an artist.
The picture above entitled "Guernsey Flower Girl" is said to be of Winifred aged about 16-18 years old, as painted by her father Henry B Wimbush.
Winifred's art appeared on Tuck postcards in the early 1900s, around & during World War I.
You can see more of her art work here Wimbush, Winifred
Skating On Thin Ice Sporting Girls, set number 3603,
artist Winifred Wimbush
The innocence of the very young captured at the beach on a warm summer's day.
Children at the Beach Bathing France 1910c postcard
Panorama of Cairo from Mokkatam Egypt signed by A Z Franke litho postcard. Available on eBay http://ebay.to/28Vr6CZ
Steamer landing Rue de l'appontement Ismailia Egypt 1903 postcard
The Postcard Depot - the home of vintage postcards online.