In 1999, Tony Blair was filmed taking a trip on the Tube. Laughing, he apologised to a fellow passenger about the disruption, as he was snapped by photographers.
In the good old-fashioned style of Tube passengers throughout the ages, she ignored him.
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If you've been anywhere near Trafalgar Square today you'll notice something different.
Look closely at this collection of images by photographer Jim Grover and you'll notice there's something missing.
Sir Bernard Hogan-Howe's decision to retire comes after growing speculation about his future and his relationship with mayor Sadiq Khan.