Queen at science museum
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The Queen sends her first tweet through @BritishMonarchy account

The Queen's has sent her first tweet - sent through the @BritishMonarchy account - heralding the launch of a major new exhibition at London's Science Museum.

The Information Age gallery takes visitors on a journey through the history of modern communications from the telegraph to the smartphone, as Rory Cellan-Jones reports.

Go to next video: Information Age exhibition opens