The Queen congratulated "supercalifragilisticexpialidocious" teenage essay prize winners by comparing them with the young author of Mary Poppins.Camilla has been hosting the Commonwealth's oldest writing competition for a decade and this year's theme was "our common wealth".Four youngsters aged between 13 and 16 - from Malaysia, Singapore and Uganda - were presented with certificates by the Queen at Buckingham Palace on Thursday.

The Queen congratulated "supercalifragilisticexpialidocious" teenage essay prize winners by comparing them with the young author of Mary Poppins.Camilla has been hosting the Commonwealth's oldest writing competition for a decade and this year's theme was "our common wealth".Four youngsters aged between 13 and 16 - from Malaysia, Singapore and Uganda - were presented with certificates by the Queen at Buckingham Palace on Thursday.