Lights Out as Britain commemorates WW1

Britain's most famous landmarks including the London Eye, Houses of Parliament, Downing Street and Gateshead's Millennium Bridge were plunged into darkness for an hour last night to mark the moment Britain first declared war on Germany in 1914.

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William, Kate and Harry visit Tower of London memorial

The royal trio chat to staff at the Tower.

Princes William and Harry and the Duchess of Cambridge paid a visit to the Tower of London today as part of the commemoration of the First World War centenary.

The grounds of the Tower were covered in poppies to mark the centenary of World War I.

The trio chatted to staff and the famous Beefeaters at the site, which is one of London's oldest buildings.

The group looks out from the Tower of London's ramparts.

The grounds of the tower were specially covered with poppies to commemorate 100 years since the beginning of the conflict that claimed over 1 million British lives.

The Tower was one of a number of famous monuments that turned out their lights to mark the centenary.

Prince Harry shakes hands with one of the Tower's famous Beefeaters.

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