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The stunning interiors of the new £750 million “glass cube” US embassy on the banks of the Thames were revealed for the first time today.

Ambassador Woody Johnson hosted tours of the 518,000 sq ft building in Nine Elms ahead of its expected formal inauguration by President Trump on his “working visit” to London in February.

The 12- storey structure, designed by Philadelphia-based architects Kieran Timberlake, has taken four years to complete and replaces the embassy on Grosvenor Square, Mayfair, which is being turned into a hotel.

It is said to be the most expensive embassy building in the world, although diplomats say it has been funded entirely from the sale of properties in London.

First look at the new US embassy 17 show all First look at the new US embassy 1/17 Exterior of the US Embassy in London 2/17 Consular Services 3/17 Pacific Forest Garden 4/17 Main Lobby 5/17 Ambassador Wall in Main Lobby 6/17 Facade detail 7/17 A general view inside the new US Embassy in south London before it opens for business in January 2018 PA 8/17 A general view inside the new US Embassy in south London before it opens for business in January 2018 PA 9/17 The visa hall at the new US Embassy PA 10/17 A bar inside the new US Embassy PA 11/17 Detail in Consular Services 12/17 The Department of The Treasury inside the new US Embassy PA 13/17 Exterior of the US Embassy in London 14/17 Outer envelope detail 15/17 Consular Services 16/17 View from office toward River Thames 17/17 Outer envelope detail 1/17 Exterior of the US Embassy in London 2/17 Consular Services 3/17 Pacific Forest Garden 4/17 Main Lobby 5/17 Ambassador Wall in Main Lobby 6/17 Facade detail 7/17 A general view inside the new US Embassy in south London before it opens for business in January 2018 PA 8/17 A general view inside the new US Embassy in south London before it opens for business in January 2018 PA 9/17 The visa hall at the new US Embassy PA 10/17 A bar inside the new US Embassy PA 11/17 Detail in Consular Services 12/17 The Department of The Treasury inside the new US Embassy PA 13/17 Exterior of the US Embassy in London 14/17 Outer envelope detail 15/17 Consular Services 16/17 View from office toward River Thames 17/17 Outer envelope detail

The location next to the river, and a half-moon shaped “moat” around one side, are designed to give the building a level of security that could never be achieved by the current site in the midst of a residential neighbourhood.

Its opening will kick-start the growth of a new “diplomatic quarter”, with the Dutch embassy also moving to the area and the Chinese reportedly eyeing another site nearby.

The building will have 800 staff and attract about 1,000 visitors a day. They will be greeted by curving walkways into the interior, with gardens on every floor, each representing a different landscape of the US, including the Canyonlands, the Gulf Coast, the Midwest and the Pacific forests.

Artworks in the building include a monumental cast of a typical US suburban house in the lobby, created by English artist Rachel Whiteread.

Diplomats say the embassy will be “a modern, secure and accessible facility that fully supports the most active and important bilateral relationship in the world”.

An embassy spokesman said the building, which will be open to the public in January, “is state of the art... it will be a great home for us as we work to deepen and strengthen the Special Relationship.”