“We crossed the frontier into Switzerland on the day of the election. We heard from people later that they had come to the house after the election, at eight o’clock in the morning. If we had left it another 24 hours we wouldn’t have got out so our lives were saved.”

The Kerrs moved from Switzerland to Paris and then to Britain, joining the influx of German Jewish refugees.

Judith, who now has no trace of an accent, adapted well to life here, learning English after she had already picked up French. She eventually joined the BBC as a television scriptwriter.

But she said she had always enjoyed drawing. Indeed, some of Judith’s fragile childhood drawings survive, having been brought out of Germany by her mother, and they will feature in the exhibition in September.

Karen Sample, a teacher at Christ Church, said the children had been very excited about meeting Judith and about the project.

“The nature of When Hitler Stole Pink Rabbit has really inspired them and fuelled them to learn more,” she said.

Judith’s archive of original illustrations and manuscripts is held by Seven Stories and will feature in the exhibition. The pupils have also had access to them.

Sarah Lawrence, collection director at Seven Stories, said Judith’s was a moving story with a happy ending and it was wonderful that children with similar experiences of displacement were having the chance to share their stories with her.

The children’s work, including their encounter with Judith, is being filmed by a company called Magic If Ltd, run by Bev Fox and Ian Mclaughlin. They also plan to film Judith in her London studio for a feature in the exhibition.

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