Cardiff announced Malky Mackay's job was safe a week ago after fans voiced their anger at the report that he had been told to resign or be sacked by the Welsh club's owner Vincent Tan.
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The Duke and Duchess of Cambrige have been together for 15 years and will have three children under the age of four.
News of William and Kate’s third child was announced on September 4 and the duchess went on maternity leave on March 22.
Prince Harry will move down to sixth in line to the throne.