The "Helter Skelter" skyscraper being erected by German property fund manager Difa is likely to be the tallest in the City of London as its 288m height has been set as the ceiling by planners and airspace regulators.
The £1bn (€1.5bn) 60-storey Bishopsgate Tower will be 50m taller than One Canada Square, known as the Canary Wharf tower, currently the tallest building in the UK.