London has made a commitment to reduce CO₂ emissions by 60% to 18 million tonnes by 2025. Central to this is access to good quality data on energy use across the city (defined as the geopolitical boundary of the Greater London Authority).

Measurement allows London, and other cities, to assess risks and opportunities, track progress, and develop and target energy efficiency interventions in a quantifiable and transparent way. Reducing London's energy demand by just 5% will save the city £400m.

London’s current approach relies on energy-use data from central government. This has limited applications for monitoring, reporting and policy making due to the low level of spatial disaggregation of the data and the time delay in their publication.

London therefore invites solutions for the development of a dynamic energy use inventory (in kWh, and accompanying greenhouse gas emissions) for the combustion of fossil fuels and electricity consumption at all stationary sources within the city boundaries (90km²; 8 million residents; 3 million homes; 110 million square metres of floor space for commercial and industrial facilities).

This new bottom-up methodology should be able to show energy use across the city in near real-time and down to the level of individual buildings and industrial facilities using available, modelled and/or newly sourced data.

Solutions presented should include a robust methodology and may also include software and data-sourcing elements. They should be manageable in-house and provide high-quality data and verifiable results (against central government energy-use data).

The current inventory, and other information on London, is available on the London Datastore http://data.london.gov.uk/.