Before the Duchess of Cambridge arrived at Mons Barracks, a soldier had fainted during the St Patrick's Day parade. He was helped to his feet and appeared to be unhurt.
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Paramedics were called to reports of an unresponsive baby girl on a bus in east London - she later died in hospital.
Transport for London is not happy that its branding has been used.
If you've been anywhere near Trafalgar Square today you'll notice something different.