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British Prime Minister Rishi Sunak's wife, Akshata Murty (L) and Ukraine's First Lady Olena Zelenska react as they are shown a laboratory where an amputee would trial walking with a prosthetic limb, during a visit to the Michael Uren Biomedical Engineering Research Hub at Imperial College in west London on February 29, 2024. (Photo by Jack Hill / POOL / AFP) (KEYSTONE/POOL/JACK HILL)