London 2012 medallists Natasha Baker and Louis Smith have updated their Twitter profiles with their new titles.
They were formally presented with their honours by the Queen earlier today.
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London arts and textiles teacher Andria Zafirakou beat 30,000 others from 170 countries to be crowned winner at the ceremony in Dubai.
Kent Police said they believe the driver had been asked to leave the club following an altercation.
Emergency services were called to South Street in Enfield this morning, but the victim was pronounced dead around 30 minutes later.