Cyclist Joanna Rowsell tweeted a picture of her hat box, as she prepared for today's outing to Buckingham Palace.
The Olympic champion from Sutton said she was "so excited" about the occasion.
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Research into property prices has found London has more areas with an average price of more than £1m than anywhere else in the UK.
A permanent memorial will be unveiled today in memory of murdered Middleton soldier Lee Rigby.
The desk and chair where Charles Dickens sat to write his final novels have been bought for the nation using a national heritage grant.