Bueno Analytics London Event May 7, 2026 - How AI is Transforming Building Operations
Session 1: How 40 Leadenhall is Building a Foundation for Long-Term Operational Performance
At Bueno Analytics’ London event, How AI is Transforming Building Operations, Lee Stentiford, Director of Development Management at Nuveen Real Estate, provided a practical behind-the-scenes look at the delivery and operational strategy behind 40 Leadenhall, one of London’s most significant commercial developments.
The session explored the scale and complexity of delivering a 900,000 sq. ft commercial building in the heart of London, while also highlighting the increasing importance of operational performance, commissioning, Defects Liability Period (DLP) analytics, and long-term optimisation.
Originally acquired by Nuveen in 2011 following the global financial crisis, the Leadenhall Triangle development secured planning approval in 2014, which at the time represented the largest planning permission ever granted by the City of London. The project was later acquired by M&G, with Nuveen retained to lead development and delivery.
Today, 40 Leadenhall stands as one of London’s most advanced commercial buildings, targeting:
- 5 Star NABERS Energy
- WELL Platinum
- WiredScore Platinum
- SmartScore Platinum
while operating at approximately full occupancy.
A landmark development in the City – How 40 Leadenhall came together
Lee walked through the background of the Leadenhall Triangle, including acquisition timing, the planning pathway, and the realities of funding and sequencing a project of this size. He described the long lead times required for major developments and the importance of making foundational decisions early, well before the fit-out and operations phase.
Delivery at scale – Phased handovers and the “six-year technology problem”
A major theme was how long build cycles can clash with technology cycles. Lee explained that a 2019–2025 project timeline means technology decisions made early can be outdated by the time practical completion arrives, which is why adaptability matters as much as capability.
Designing for the post-COVID workplace – Amenity, experience and usability
Lee highlighted how the building’s offer evolved as occupier expectations shifted, particularly around wellbeing, experience, and the need to draw people back into the office. He described 40 Leadenhall as operating at “small town” scale when fully occupied, which shaped how amenity and services were planned.
“If this building’s fully occupied, there’s 10,000 people in it. So it’s the size of a small town.”
— Lee Stentiford, Nuveen Real Estate
Smart building blueprint – Connecting systems without creating complexity
Rather than positioning “smart” as a bolt-on, Lee outlined the approach of defining user journeys, creating a smart blueprint with key stakeholders, and then building the digital foundations to support operations. He referenced the importance of pulling building data together (so operational teams can run the asset effectively) and the role of analytics in supporting that model.
Lessons learnt – What to do differently next time
The strongest operational takeaway was simple: get smart building scope into the project early. Lee emphasised embedding enabling infrastructure from the start, procuring with the right contractor capability, and avoiding the friction of “layering” smart requirements onto an existing contract midstream.
Building Beyond Design Intent
A major theme throughout the session was the growing shift in commercial real estate from simply delivering buildings to ensuring they continue performing operationally after handover.
As Lee explained, delivering a building at this scale is not only about construction, but about creating a long-term operational framework capable of supporting tenant performance, energy efficiency, and future optimisation.
“There’s not many chances in a career to deliver a building of this scale, this magnitude, of this significance in the city.”
— Lee Stentiford, Nuveen Real Estate
The discussion also reinforced how phased handovers and live tenant occupation create additional operational complexity during commissioning and DLP periods.
Bueno Analytics was selected as the Building Systems Analytics Package (BSAP) partner following a competitive RFP process involving more than 20 vendors.
The deployment at 40 Leadenhall focuses on:
- commissioning validation
- DLP defect identification
- operational optimisation
- NABERS performance tracking
- ongoing building analytics
The platform currently integrates:
- 16,000+ data points
- 2,700+ connected equipment assets
- BMS, EMS, CAFM, and broader building systems integration
Early operational outcomes already include:
- HVAC and chilled water optimisation
- identification of scheduling and controls issues
- metering and connectivity validation
- tenant comfort improvements
- support toward achieving a 5 Star NABERS Energy outcome
The Shift Toward Operational Buildings
One of the strongest themes from the session was the industry-wide transition from static building delivery toward continuously optimised operational assets.
The event highlighted how analytics, AI-driven workflows, and DLP performance management are becoming increasingly important in premium commercial real estate, particularly as NABERS UK, operational ESG reporting, and tenant expectations continue to evolve.
For 40 Leadenhall, the focus is no longer only on construction completion, but on ensuring the building continues to perform operationally over time through:
- continuous commissioning
- defect validation
- operational analytics
- predictive optimisation
- ongoing performance management
The session provided attendees with a practical example of how modern commercial buildings are increasingly using analytics not simply to monitor systems, but to create a long-term operational performance framework.
If you would like to discuss what the 40 Leadenhall delivery story means for your portfolio, contact Bueno for more information.
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