The Queen, the Duke of Edinburgh and the Duchess of Cambridge visited Baker Street to mark the 150th anniversary of the Underground. They met Tube staff, spoke to Sherlock Holmes and unveiled a plaque on a train.
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The review will look at how the city would cope if multiple terror attacks were launched.
Eric's been performing his impressive stunts at Clissold Park and even skates the half pipe.
The unusual sight caused quite a stir on Twitter.