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Preliminary Market Engagement - Sellafield Limited: Network Services

Sellafield Ltd

This public procurement record has 2 releases in its history.

Planning

22 Oct 2026 at 12:29

UK2 - Preliminary Market Engagement Notice
Planning

22 Oct 2026 at 12:06

UK1 - Pipeline Notice
Summary of the contracting process

Sellafield Limited is planning to procure network and communications services for its estate in Warrington and Cumbria. The scope covers external connections to networks and data centres, including internet, satellite and voice links; local and wireless networks; data-centre networking and managed wide-area networks; and shared infrastructure such as addressing, routing, load balancing and time services. It also includes network access control and security, enterprise voice services from VoIP and contact centres to plant-critical telephony, and standalone broadband and telephone services. The supplier is expected to operate and maintain network services, including a network operations centre, and may provide projects, hardware, software and management of third-party contracts. The work spans corporate, operational technology and business-critical applications. It is network services (CPV 32400000).

This is at the planning and preliminary market engagement stage: Sellafield is seeking supplier feedback through a Request for Information to test market capability and capacity, validate or refine requirements, and shape its procurement strategy. The buyer expects to run a competitive call-off under the Network Services 4 framework, using its internet connectivity, local connectivity, and voice and unified communications lots. It anticipates launching the competition in July 2027. The planned contract period runs from 1 July 2028 to 30 June 2035. The estimated value is £75 million excluding VAT (£90 million including VAT). Suppliers wishing to provide feedback are asked to submit it through Atamis by 12 November 2026 at 23:59 GMT; this is the engagement response deadline, not a tender deadline. No award criteria are set out at this stage.

This future requirement is suited to established network service providers able to deliver and integrate connectivity, data, voice and security services across a large, complex estate. Relevant capabilities include MPLS, data-centre interconnects, internet and satellite connectivity; LAN, wireless and managed WAN; network routing, security, traffic management and application delivery; and resilient shared infrastructure. Suppliers should be able to provide enterprise telephony, including VoIP, analogue, contact-centre and plant-critical services, alongside broadband and standalone voice services. The scope also favours providers with the operational capacity to run a network operations centre and handle administration, planning, integration, maintenance and service management. The buyer is also considering project delivery, supply of hardware and software, and management or replacement of third-party contracts. Its market engagement is intended to understand suppliers’ capabilities and capacity; detailed qualifications and accreditations are not yet set out.

How relevant is this notice?

Notice Information

Notice Title

Preliminary Market Engagement - Sellafield Limited: Network Services

Notice Description

Sellafield Ltd is considering a call for competition for Network Services under the Network Services 4 (NS4) Framework Agreement (RM6377) Lot 1 Internet Connectivity Services (WAN), Lot 2 Local Connectivity Services (LAN), and Lot 3 Voice and Unified Communications. We anticipate launching this call for competition in July 2027. Sellafield Ltd is undertaking Preliminary Market Engagement to provide suppliers with an understanding of the Network Services opportunity and inviting feedback through a Request for Information (RFI), on key aspects of the requirement. The information gathered will help Sellafield Ltd assess market capability and capacity, validate and, where appropriate, refine its requirements, and inform its procurement strategy and approach. The proposed scope of the Network Services is as follows: External Connectivity The provision of circuit only connectivity from internal Sellafield networks to external networks and data centres including MPLS, DCI, internet, satellite and SIP connectivity. Corporate Data Services The provision of local, wireless, data centre networking and managed WAN overlay services supporting corporate, operational technology and business-critical applications across the Sellafield estate, including connectivity, routing, security, traffic management, application delivery and WAN management. Core Network Services The provision of shared network infrastructure services enabling secure and resilient operation of the Sellafield estate, including IP address allocation and management, network configuration, load balancing and time services. Network Security Services The provision of network-based access control, threat protection and gateway security services for users, devices, applications and internet connectivity across the Sellafield estate. Enterprise Telephony Services The provision of enterprise-wide voice communications services, encompassing, VoIP, analogue, contact centre and plant critical telephony alongside integrated voice applications and voice gateway services for connectivity to external voice networks and platforms. Standalone Services The provision of standalone, ad-hoc voice and data services, including fibre to the cabinet, (FTTC), fibre to the premises (FTTP) and single order ADSL (SOADSL) broadband connectivity and telephony services. Network Operations, Planning and Management The provision of network administration, planning, integration and management services and the setup, management, maintenance and operation of a network operations centre (NOC) to operate the Network Services. Optional Services In addition to the baseline services and agreed service instructions, the supplier shall provide optional services, including the delivery of projects and the provision of hardware and software, where required by Sellafield. Third-Party Contract Management The provision of new third-party contracts necessary for the provision of the Network Services where required by Sellafield. This shall also include acting as an agent, to manage and operate third-party contracts on behalf of Sellafield or novate or replace existing third-party contracts where required by Sellafield.

Planning Information

Sellafield Ltd is conducting this Request for Information (RFI) to offer potential participants the opportunity to engage with Sellafield Ltd to better understand the contract opportunity and provide feedback. This feedback will inform and shape the procurement of the Network Services. To obtain further information and provide feedback, suppliers must register their interest via the Nuclear Decommissioning Authority and Sellafield Ltd E-procurement system, Atamis. This can be found at the following address: https://atamis-2464.my.site.com/s/Welcome.  Upon registration on Atamis, suppliers will be able to access all relevant documentation and submit their feedback using record reference “C32984, Preliminary Market Engagement – Network Services”. The deadline for submissions is at 23:59 GMT on 12 November 2026.

Notice Details

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-078dc7
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/099945-2026
Current Stage
Planning
All Stages
Planning

Procurement Classification

Notice Type
UK2 - Preliminary Market Engagement Notice
Procurement Type
Framework
Procurement Category
Services
Procurement Method
Selective
Procurement Method Details
Award under framework
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

32 - Radio, television, communication, telecommunication and related equipment

45 - Construction work

50 - Repair and maintenance services

64 - Postal and telecommunications services

72 - IT services: consulting, software development, Internet and support

CPV Codes

32400000 - Networks

32420000 - Network equipment

32429000 - Telephone network equipment

32551400 - Telephone network

32552100 - Telephone sets

45314200 - Installation of telephone lines

50334110 - Telephone network maintenance services

64210000 - Telephone and data transmission services

64211000 - Public-telephone services

64213000 - Shared-business telephone network services

64215000 - IP telephone services

72700000 - Computer network services

72710000 - Local area network services

72720000 - Wide area network services

Notice Value(s)

Tender Value
£75,000,000 £10M-£100M
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
22 Oct 20264 days ago
Submission Deadline
Not specified
Future Notice Date
1 Jul 20279 months to go
Award Date
Not specified
Contract Period
1 Jul 2028 - 30 Jun 2035 Over 5 years
Recurrence
Not specified

Notice Status

Tender Status
Planned
Lots Status
Planned
Awards Status
Not Specified
Contracts Status
Not Specified

Buyer & Supplier

Contracting Authority (Buyer)

Main Buyer
Sellafield Ltd
Contact Name
Available with D3 Tenders Premium →
Contact Email
Available with D3 Tenders Premium →
Contact Phone
Available with D3 Tenders Premium →

Buyer Location

Locality
WARRINGTON
Postcode
WA3 6GR
Postcode Area
Warrington
Country
England
Major Region (ITL 1)
TLD North West (England)
Basic Region (ITL 2)
TLD6 Cheshire
Small Region (ITL 3)
TLD61 Warrington
Delivery Location
TLD11 West Cumbria, TLD61 Warrington
Local Authority
Warrington
Electoral Ward
Birchwood
Westminster Constituency
Warrington North

Further Information

Notice Documents

Open Contracting Data Standard (OCDS)

View full OCDS Record for this contracting process

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The Open Contracting Data Standard (OCDS) is a framework designed to increase transparency and access to public procurement data in the public sector. It is widely used by governments and organisations worldwide to report on procurement processes and contracts.

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