There have been a number of special edition Oyster cards over the years, commemorating events such as the 2012 London Olympic and Paralympic Games, the Wedding of the Duke and Duchess of Cambridge, The Queen's Diamond Jubilee and the 150-year anniversary of London Underground.
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Boris Johnson has been admitted to hospital after experiencing persistent coronavirus symptoms.
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A man from East London has climbed the height of the UK's highest mountain, Ben Nevis by trekking up his staircase inside his home.