The Duke and Duchess of Cambridge attend the inaugural awards ceremony for the African conservation charity Tusk Trust at the Royal Society in London.

It was the duchess' first official public appearance since giving birth to Prince George two months ago.

During the gala, Prince William - Patron of the charity - presented two awards for outstanding achievement in African Conservation - a cause he has embraced and spoken out on.

SOUNDBITE: Prince William, Duke of Cambridge, saying:

"It is a genuine pleasure for Catherine and me to be here tonight at the Tusk Awards for conservation in Africa, for a cause that has never been closer to our hearts than it is right now. As you might have gathered, Catherine and I have recently become proud parents of a baby who has a voice to match any lion's roar. This is actually our first evening out without him, so please excuse us if you see us nervously casting cheeky glances at our mobile phones to check all is well back home."

Earlier in the day, his office announced William plans to leave the military - and focus on his charity and royal duties.

The new father had been working as a service and rescue helicopter pilot in the Royal Air Force - and is considering options for a future role in public service.

He does not plan to go into full-time royal duty - yet.