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Duke and Duchess attend Ark charity dinner in London

10 June 2011 Last updated at 10:05 BST

The newly-wed Duke and Duchess of Cambridge have attended their first official engagement.

The gala dinner marked the 10th anniversary of "Ark Absolute Return for Kids", which was set up by financier Arpad Busson and sponsors academy schools in the UK and programmes for disadvantaged children around the world.

The Duke announced a joint venture by the Foundation of Prince William and Prince Harry and the Ark charity, and said he and his brother would expand their project to parts of sub-Saharan Africa.

Luisa Baldini reports.