Prince Harry has begun inspecting an international fleet of warships in Sydney Harbour.
The Prince was joined by Governor-General Quentin Bryce and Australia's Prime Minister, Tony Abbott MP in front of thousands of spectators on the shore line.
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The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.