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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He was found close to Harrow and Wealdstone station just before 7pm and was taken to a central London hospital.
Darren February broke into Cowell's home as he and his family slept and his security guard used the toilet.
Pilots taking off or landing at the west London airport were targeted 151 times in 2016.