---
title: "Digital Upgrade of the UK's National Atmospheric Emissions Inventory System Contract Modification"
ocid: "ocds-h6vhtk-03992c"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-03992c"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-03992c.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-03992c.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "DEPARTMENT FOR ENERGY SECURITY AND NET ZERO"
published: "2025-04-03"
---

# Digital Upgrade of the UK's National Atmospheric Emissions Inventory System Contract Modification

Buyer: DEPARTMENT FOR ENERGY SECURITY AND NET ZERO  
Current stage: Award  
OCID: ocds-h6vhtk-03992c

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## Summary

The Department for Energy Security and Net Zero seeks to digitally upgrade the UK’s National Atmospheric Emissions Inventory System. The contract, focusing on information technology services, involves a comprehensive rebuild to ensure the system's robustness and up-to-date functionality. The procurement, at the award stage as of 3rd April 2025, commenced on 23rd October 2023 and is set to conclude by 30th September 2026. Key contractors, including KPMG LLP, Mott MacDonald, and Aether Limited, will simplify the current system, build a modular new system, and ensure transparent emissions calculation processes. This project covers the entire UK region and is aligned with the statutory requirements for reporting greenhouse gas and pollutant emissions.

This tender offers substantial opportunities for technological companies specialising in system architecture, data analysis, and software development. Businesses with expertise in modular software systems, environmental data processing, and compliance with international emission reporting standards are well-suited to compete. The successful enhancement of the NAEI system will provide critical support to the UK Government’s climate commitments, offering long-term collaboration potential for businesses capable of ensuring high standards in technology and environmental science.

## Notice

DESNZ are procuring services to substantially upgrade & improve the software system used to generate annual estimates of Greenhouse Gas & pollutant emissions across the UK. Currently a set of XLS files, Access databases & SQL, with other software linking these, are used to store, process & report data. Outputs from this system are used by UK Gov to report against our emissions targets (inc. Carbon Budgets, Paris Agreement). Based on a requirement that will be provided you will develop a new software approach which streamlines the system, using standard architecture across all inventory sectors to store, analyze, and report emissions.

### Lot Information

Digital Upgrade of the UK's National Atmospheric Emissions Inventory System

The National Atmospheric Emissions Inventory (NAEI) quantifies national emissions of a range of greenhouse gases (GHGs) and air pollutants to the atmosphere from a variety of sources. The NAEI, which includes over forty different pollutants, is updated and published annually, and charts the history of the UK's atmospheric emissions since 1970. The current digital architecture of the NAEI system has evolved across the last 20+ years in a stepwise manner according to the growth of the system and the increasing scientific and technical complexity of the emissions calculations. The system is made up of a mix of technologies (covering Excel, Access, MySQL, R and Python scripts) and is now in need of a wholesale rebuild to make the system more robust, consistent and up to date. This contract delivers the following: * Simplify the technology suite used in current system * Build the new system in a modular way * Ensure the end-to-end process for calculation of emissions is transparent and traceable

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/012879-2025 |
| Notice type | Planning Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | Not specified |
| Awardee scale | Large, SME |
| All stages | Planning, Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 3 Apr 2025 |
| Submission deadline | 5 Sep 2023 |
| Future notice date | 31 May 2023 |
| Award date | 29 Sep 2023 |
| Contract period | 22 Oct 2023 - 30 Sep 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £4,000,000 |
| Lots value | £4,000,000 |
| Awards value | Not specified |
| Contracts value | £9,860,570 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Cancelled |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | DEPARTMENT FOR ENERGY SECURITY AND NET ZERO |
| Additional buyers | DEPARTMENT FOR BUSINESS, ENERGY & INDUSTRIAL STRATEGY |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1H 0ET |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 3 |
| Supplier names | AETHER; KPMG; MOTT MACDONALD |

## CPV Codes

### Divisions

- 48 - Software package and information systems
- 72 - IT services: consulting, software development, Internet and support

### Codes

- 48461000 - Analytical or scientific software package
- 48610000 - Database systems
- 72212990 - Spreadsheets and enhancement software development services
- 72222300 - Information technology services
- 72224200 - System quality assurance planning services

## Release History

- 3 Apr 2025 at 14:35 - AwardUpdate - Award Notice - https://www.find-tender.service.gov.uk/Notice/012879-2025
- 12 Aug 2024 at 07:51 - AwardUpdate - Award Notice - https://www.find-tender.service.gov.uk/Notice/025349-2024
- 24 Oct 2023 at 10:36 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/031318-2023
- 14 Jul 2023 at 10:42 - Tender - Tender Notice - https://www.find-tender.service.gov.uk/Notice/020248-2023
- 20 Jan 2023 at 10:42 - Planning - Planning Notice - https://www.find-tender.service.gov.uk/Notice/001799-2023

## Notice URLs

- https://beisgroup.ukp.app.jaggaer.com/
- https://www.gov.uk/government/organisations/department-for-energy-security-and-net-zero

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-03992c. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-03992c.json.