The 86-year-old monarch smiled as she said goodbye to staff as she left the King Edward VII Hospital, before she was driven away in a large Bentley.
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Austria is set vote for its new president again - and possibly elect the first far-right head of state in Europe since World War Two.
Italians go to the polls in a referendum on Sunday which could spell the end of Matteo Renzi's reign as prime minister.
A thief who posed as a council worker snatched cash from an 86-year-old woman's pension book, the Met Police said.