Janet and Anne Grahame Johnstone

The twins were born in Marylebone, London[3][4] to Royal Navy acting-Captain Edward Grahame Johnstone and portraitist and costume designer Doris Zinkeisen.

Although not widely remembered, the twins at an early stage of their career worked extensively in British television, during the formative years of children's programming.

Early commissions included Enid Blyton's Tales of Ancient Greece (1951), and new illustrations for a shocking old German children's morality book, Struwwelpeter (1950).

[8] Most of their work was done designing Christmas cards and illustrating numbers of large, brightly coloured gift books, mainly published by Dean.

Their full-page illustrations surrounding nursery rhymes, fairy tales or children's prayers were in the tradition of undemanding effusiveness set by older artists like Hilda Boswell, still hugely popular with the public though increasingly frowned on by critics.

Anne found herself unexpectedly responsible for the entire business enterprise previously shared with her sister, and managed to honour all of their outstanding commissions.

Other projects included designs for limited edition Christmas jigsaw puzzles for the British game manufacturer Waddingtons, and two books she wrote and illustrated about Santa Claus.