The Duchess of Cambridge arrived at Mons Barracks in Aldershot wearing a dark green coat with a cinched-in waist.
In her first solo military engagement, the Duchess presented traditional sprigs of shamrock to the Irish Guards at their St Patrick's Day parade.
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The station, which saw 44m people commuters use it in 2016/2017, will be transformed into a dining room complete with Christmas decorations.
Part of the monster fatberg will go on display in the Museum of London, while the rest of it will be converted into biodiesel.
Major engineering projects at key London stations mean hundreds of trains will be cancelled or diverted.