The Prime Minister sends his 'many congratulations' to the Tindalls and the Queen on the birth of the newest Royal; Official Spokesman.
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Navy officials say they have received seven short satellite calls which are though to have come from the submarine.
The President is to meet with with the army commander who put him under arrest as he resists calls for him to stand down.
The military had hoped for a smooth transition from the old leader, but Mugabe looks like he means to stay put.