Olwen Carey Evans (1892-1990) was the third child of politician David Lloyd George. She enrolled as a British Red Cross volunteer and served as a cook on the frontline in 1915. Her father became the wartime Prime Minister just one year later.
Evans was also the great-grandmother of TV presenter and historian Dan Snow.
"I’d never associated my great-grandmother with the Great War, but seeing her card shows that she did play her part,” says Snow.
“I never realised how many terrible things she must have seen but it turns out that she was there on the Western Front, in the rest stations and field hospitals, seeing and helping people to cope with all sorts of terrible injuries.”