The Duchess of Cambridge told Lady Marion Body, a former colleague of her late grandmother's, that it was "so moving" to meet her and to visit Bletchley Park, the famous "spy school" during World War II.
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The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.