The team behind the site formerly known as 1 Undershaft have also renamed the project One London.

Aroland Holdings, Stanhope and Eric Parry Architects said the scheme will rise to 309.6 metres containing 1.2 million sq ft of office-led space on completion in 2033.

The project was given full planning consent from the City of London Corporation in December 2025 and sits at the junction of Leadenhall Street and St Mary Axe.

Deconstruction of the existing building, St Helen’s Tower, is already underway by Keltbray.

At the top of the tower, Level 73 will house Europe’s highest publicly accessible viewing gallery at just over 300 metres which will be operated by London Museum, offering panoramic views across the capital.

David Camp, CEO of Stanhope, said: “One London will be a striking addition to the capital’s skyline and serve as a symbol of its enduring global pre-eminence.

“London is not short of offices in general. It is short of the very best offices that help businesses attract talent, collaborate and grow. Delivering elegant buildings that redefine how we think about the workplace, and that are woven into the fabric of London, its occupiers, businesses and communities, has been the foundation of our 35-year track record of delivering pioneering and ambitious developments.”