Digital Twin London is a comprehensive virtual three-dimensional replica of the entire city, integrating building data for over 3.5 million structures, infrastructure networks, environmental sensor readings, and transport flows into a unified digital model that enables evidence-based urban planning and infrastructure management at an unprecedented scale. The platform is developed and maintained by the Greater London Authority in collaboration with technology partners and borough councils.
The digital twin enables planners and decision-makers to simulate the impact of proposed developments before any physical construction takes place. By modelling variables such as building height, massing, shadowing, wind effects, solar exposure, flood risk, transport accessibility, and visual impact, the platform helps ensure that new developments are compatible with their surroundings and contribute positively to the urban environment. This simulation capability is particularly valuable in a city as complex and densely developed as London, where the cumulative effects of individual planning decisions can be difficult to anticipate without sophisticated modelling tools.
Real-time environmental data integration allows the digital twin to reflect current conditions across the city, including air quality, temperature, noise levels, and flood risk. This capability supports both long-term strategic planning and short-term operational decisions, such as issuing public health warnings during pollution episodes or activating flood defences during severe weather.
The platform also enhances public engagement in the planning process. Virtual walkthrough capabilities allow residents and stakeholders to explore proposed developments in an immersive 3D environment, improving understanding of how changes will look and feel in their neighbourhoods and strengthening the quality of public consultation.
Digital Twin London positions the capital at the forefront of data-driven urbanism, demonstrating how comprehensive virtual city models can improve decision-making, reduce risk, and build public trust in the planning process across one of the world's largest and most complex metropolitan areas.