The Irish Guards' regimental mascot, Conmeal the Irish wolfhound, was given his own sprig of shamrock by the Duchess of Cambridge.
The St Patrick's Day tradition dates back to 1901.
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An action shot of a chameleon as it snares its prey with its extended tongue has scooped top prize in an animal photography competition.
Arnis Zalkalns, a 41-year-old Latvian builder, vanished a week after 14-year-old Alice went missing from her home at Hanwell.
The 14-year-old vanished near her home in west London exactly three weeks ago.