Artist Stephen Wiltshire - known for drawing incredibly detailed cityscapes from memory - has captured the view from the top of The Shard.
Steep entry prices have not deterred tourists wanting to see London from the UK's highest building which opens to visitors next month.
The final piece of steel has been bolted in place on the skyscraper that's become the tallest building in Europe.
Emergency services are responding to a fire alarm at The Shard. Evacuation procedures have been followed & we are ready to assist as needed.
– London Fire Brigade
London Fire Brigade said firefighters are investigating reports of smoke in the basement of the Shard. There is no suggestion at this stage that there is a fire.
As a precaution the building is being evacuated. No injuries have been reported.
Seven fire engines and around 50 firefighters are at the scene, this is normal for this of building. Firefighters from Soho, Dockhead, Old Kent Road, Shoreditch, Whitechapel and Lambeth fire stations are at the scene.
The Brigade was called at 1030.
Firefighters are still investigating reports of smoke at the #Shard (still no fire apparent). The building is now being evacuated.
Just arrived at London bridge and The Shard is being evacuated! http://t.co/6b6nSCAZx8
All going on down at the Shard! http://t.co/ToVloylbxB
London Fire Brigade says the Shard is being evacuated as a precaution - thought to be the first time. @itvlondon
Seems there a fire in the shard 9 fire engines and counting http://t.co/G3PECn7Fl2
Fire at the shard ??? http://t.co/XSgJ2CEQJM