The Duchess of Cambridge is due to visit Bletchley Park where she will meet with a code-breaker who worked with her grandmother during the Second World War.
Code-breaker veteran Lady Marion Body recalls working alongside the Duchess' paternal grandmother Valerie Glassborow at the famous 'spy school', where codebreakers were credited with shortening the war by at least two years.
Miss Glassborow, as she was known before marrying Kate's grandfather Peter Middleton, worked as a civilian member of staff, probably as a duty officer, alongside her twin sister Mary.
Kate's solo visit will mark a year-long restoration project at the Buckinghamshire site.
More top news
Donald Trump is set to be sworn in as the 45th President of the United States but major questions still remain over his team.
Ana-Alecia Ayala became an internet sensation for her video showing her dancing and laughing through intensive chemo treatment.
In a week that has lurched from the bizarre to the surreal, we are now just a day away from one of the great rituals of American democracy.