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Centre for Digital Built Britain


CDBB’s National Digital Twin programme, delivered by its Digital Framework Task Group (DFTG), is a key step in the digital transformation of the infrastructure and construction sectors. 

The National Digital Twin and the Gemini Principles

Launched by HM Treasury in July 2018, the CDBB’s National Digital Twin programme was set up to deliver key recommendations of the National Infrastructure Commission 2017 “Data for the Public Good Report”: 

  • to steer the successful development and adoption of the Information Management Frameworkfor the built environment.
  • to create an ecosystem of connected digital twins – a national digital twin– which opens the opportunity to release value for society, the economy, business and the environment. 

The NDT programme builds on the UK BIM framework’s foundation of collaborative information management. The benefits of BIM and smart infrastructure to owners, operators and user have shown that the value of data when it is shared. 

The NDT programme is working with future users and early adopters of digital twins to develop an information management framework to connect digital twins to deliver benefit to all. The creation of the framework forms an integral part of HM Government’s modern Industrial Strategy and Construction Sector Deal.

Key milestones

Initial activity focused on aligning industry and government behind a common definition and approach to information management, so that data can be shared openly and securely between future digital twins. This includes:

  • the 2018 publication of the Gemini Principles, a paper setting out the proposed principles to guide the national digital twin and the information management framework that will enable it;
  • the 2018 publication the Roadmap, a prioritised plan for five core streams responsible for the delivery of the information management framework;
  • the 2019 creation of the Digital Twin Hub (DT Hub), a web-enabled community for early adopters of digital twins to learn through sharing and progress by doing.

Work programme:

The programme is delivered by CDBB’s Digital Framework Task Group (DFTG) and its steering groups. The DFTG is made up of senior leaders within the landscape and is chaired by Mark Enzer, Chief Technical Officer of Mott MacDonald. It reports to HM Government through the CDBB Strategic Advisory Board. The NDT programme is made up six core streams, aligned with the Roadmap:

Approach stream

To set up coordinated and aligned activity across the whole NDT programme which will deliver the framework and the benefits of effective information management in the built environment.

Approach Stream Lead, Miranda Sharp, Ordnance Survey  


Governance stream

To establish the structures and processes for managing the framework through three phases of development, adoption and (sector specific) ongoing oversight.

Tender Available: Tender: Research to establish a baseline benefits dataset to support the National Digital Twin Programme

Governance Stream Lead, Paul Campion, TRL

The Commons stream

To develop the necessary support for effective information management via guidance, specifications and standards​. Taking a “minimum viable” approach to the development of national-level framework resource for effective information management in the built environment​.

The Commons Stream Lead, Miranda Sharp, Ordnance Survey (previously held by James Hetherington)


Enablers stream

Designing and delivering a prioritised and proactive programme enable the changes required for the adoption of the information management framework and compliant digital twins.

Enablers Stream Lead, to be announced soon.


Change Stream

To facilitate adoption of the framework across the whole ecosystem of the built environment, particularly amongst the early adopters and early majority of both twins and the framework.

Change Stream Lead Nicola Pearson, CDBB


DT hub

To provide a learning and best practice sharing community for those who are testing and developing digital twins within the built environment.

Chaired by Samuel Chorlton


Learn more about CDBB’s National Digital Twin Programme here.

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