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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The capital's theatres also generate more searches than those in any other city, according to research by Google.
Union officials are expected to meet next week to plan further stoppages if talks fail to resolve the dispute.
Natalie Sharp and Christine Bicknell appeared in court over an alleged incident at a Lidl superstore in Wallington, south London.