Prince Philip opens Ordnance Survey HQ in Southampton

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The Duke of Edinburgh has officially opened the new headquarters building of the Ordnance Survey in Southampton.

The £40 million Explorer House complex is the latest home for the national map-making agency which has been based in the city since 1842.

He was given a tour of the site where more than 250 surveyors use the latest technology to digitally map every corner of Britain.

The duke, 90, joked about being "the world's most experienced plaque unveiler" as he performed the opening ceremony.

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