This public procurement record has 4 releases in its history.

Award

16 Jul 2026 at 18:57

Tender

28 Oct 2024 at 17:40

TenderUpdate

05 Jul 2023 at 16:18

Planning

05 Jul 2023 at 14:56

Summary of the contracting process

Network Rail Infrastructure Ltd procured isolation and associated electrical engineering services for railway traction power equipment. The requirement covers planning, design, delivery, hand-back and maintenance of electrical isolations and related construction services for 25kV AC, 750V DC and 1500V DC overhead line equipment, plus third and fourth rail DC conductor rail equipment. Activities include safe-system-of-work planning, isolation diagrams and forms, electrical risk assessments, earthing and shorting, residual hazard controls, permits to work, permanent earth sections, return-conductor isolations, temporary bonding, surveys and structure bonding. Work is organised across the Eastern Region of England, North West and Central Region of England, and Wales and Western Region of England and Wales, for use by Network Rail national functions.

The procurement is complete and awards and active contracts are recorded for the Eastern, North West and Central, and Wales and Western regions. The contracts were signed on 1 May 2026. The framework was run as a selective negotiated procedure with prior call for competition, using successive reduction, and allows up to 27 participants. It has a maximum estimated value of £376,000,000. Each regional lot has a 1,080-day contract period and three optional 12-month extensions; suppliers could be awarded up to three lots. The tender submission deadline was 27 November 2024 at 10:00 UTC. Bids had to be in English, with no variants allowed, and evaluation required suitability evidence including specified rail-industry certifications.

This requirement is relevant to specialist rail electrical contractors and engineering service providers able to manage isolations on electrified railway infrastructure across substantial regional service areas. Credible suppliers need competent electrical isolation staff for both DC conductors and overhead line equipment, as well as capability in isolation management. The required RISQS certifications are A.A.9.3 for electrical isolation staff servicing DC conductors, A.A.9.4 for electrical isolation staff servicing OHLE, and C.C.3.4.9 for isolation management services. Delivery also demands sufficient competent personnel, road-rail vehicles, approved and calibrated equipment, suitable transport, technical planning, documentation, safety briefings, liaison with electrical control rooms and principal contractors, and disciplined performance reporting.

How relevant is this notice?

Notice Title

Isolation & Associated Services

Notice Description

The supply of Isolation & Associated Services to Lot 1 Eastern Region, Lot 2 North West and Central Region and Lot 3 Wales and Western Region. The framework will be available for any Network Rail (NR) national function to use. This sourcing activity will provide Network Rail with a comprehensive call-off isolation and construction services for 25kV AC, 750V DC, and 1500V DC Overhead Line (OLE) and 3rd and 4th rail DC conductor rail equipment (CRE) systems within the Service Areas covered by the regions listed above.

Lot Information

Isolation & Associated Services Lot 1 Eastern

Isolation & Associated Services Lot 1 Eastern

Isolation & Associated Services - Eastern Region

The services could comprise of professional services, technical solutions, labour, and tools and equipment to deliver planning, design, delivery, hand back and maintenance in relation to isolation and construction services as outlined in the applicable standards. The framework suppliers shall undertake activities including, but not limited to, the following: a. Plan and implement an electrical safe system of work (isolation) taking account of the task(s), task delivery method(s), OLE/CRE infrastructure, the presence of residual electrical hazards and the required control measures, b. Review isolation diagrams and instructions, c. Plan and carry out pre-isolation walkouts as required by the relevant standards, d. Attendance, by competent persons, at interface meetings including Network Rail Possession meetings, isolation interface meetings and 'white board' reviews as required by The Service Manager, e. Liaison with third party isolation planners including Network Rail and its Principal Contractors, f. Liaison with, and co-ordination of, Network Rail and other isolation service providers where the Consultant is identified as the 'lead' isolation provider - this includes the management and submission of all paperwork required to implement the electrical safe system of work, g. Plan, complete and submit Isolation Details Forms (IDF) in accordance with the Service Area's published timescales, h. Identify earthing/shorting requirements, in accordance with the relevant standards, to provide safe working arrangements matched to the proposed task and task delivery activities and methodologies, i. Identify and facilitate the management of traction power electrical hazards, in addition to OLE/CRE, affecting work activities (e.g. traction return bonding; red bonds; nearby distribution feeders or equipment; outside parties' HV electrical supplies crossing the railway, etc.), j. Identify and record all residual electrical hazards that will remain on site after isolation and earthing/shorting has been completed, and provide control measures e.g., RoLE equipment devices, as required by standards, k. Where required, plan and undertake briefing of site personnel as required, permit work activities near OLE and CRE, and manage permit to work documentation until cancellation, l. Where required, produce Work Package Plans (WPP), m. Resource all isolation staffing requirements by provision of sufficient competent resources to meet the Service Area's / Service Manager's target timescales for implementation / removal of an isolation, n. Provide all requisite Road Rail Vehicles (RRVs) to expedite isolation delivery, o. Produce walk-out packs as defined by the client, p. Provide approved isolation equipment to enable the safe isolation of OLE / CRE and be fully compliant with Network Rail's Life Saving Rules, q. Provide and check all task-specific equipment is fit for use and, where required, fully calibrated and registered, r. Produce methodologies and task briefings, s. Carry out the requisite Safe System of Work Pack planning in accordance with the relevant standards, t. Carry out electrical risk assessments, u. Maintain isolation diagrams and instructions up to date, v. Compliance with the provision of periodic (four weekly) Key Performance Indicator data and other data to support the monitoring of leading and lagging performance indicators linked to Network Rail's Electrical Safety Strategy, w. Provide on-site messing facilities where agreed with the Service Manager, x. Provide suitable and sufficient transport, y. Liaise with the Network Rail Electrical Control Room, z. Design, Planning and Installation of Permanent Earth Sections, aa. Where required, plan and implement Return Conductor (RC) Isolations, bb. Temporary Works Bonding, cc. Heights and Staggers Survey, dd. Condition Survey, ee. Structure Bonding Works. The above list is subject to change, e.g. legislation or NR standards or systems changes. Additional information: Please contact Suzanne.hall@networkrail.co.uk for further information.

Renewal: Three optional 12 month extensions

Isolation & Associated Services - North West & Central Region

The services could comprise of professional services, technical solutions, labour, and tools and equipment to deliver planning, design, delivery, hand back and maintenance in relation to isolation and construction services as outlined in the applicable standards. The framework suppliers shall undertake activities including, but not limited to, the following: a. Plan and implement an electrical safe system of work (isolation) taking account of the task(s), task delivery method(s), OLE/CRE infrastructure, the presence of residual electrical hazards and the required control measures, b. Review isolation diagrams and instructions, c. Plan and carry out pre-isolation walkouts as required by the relevant standards, d. Attendance, by competent persons, at interface meetings including Network Rail Possession meetings, isolation interface meetings and 'white board' reviews as required by The Service Manager, e. Liaison with third party isolation planners including Network Rail and its Principal Contractors, f. Liaison with, and co-ordination of, Network Rail and other isolation service providers where the Consultant is identified as the 'lead' isolation provider - this includes the management and submission of all paperwork required to implement the electrical safe system of work, g. Plan, complete and submit Isolation Details Forms (IDF) in accordance with the Service Area's published timescales, h. Identify earthing/shorting requirements, in accordance with the relevant standards, to provide safe working arrangements matched to the proposed task and task delivery activities and methodologies, i. Identify and facilitate the management of traction power electrical hazards, in addition to OLE/CRE, affecting work activities (e.g. traction return bonding; red bonds; nearby distribution feeders or equipment; outside parties' HV electrical supplies crossing the railway, etc.), j. Identify and record all residual electrical hazards that will remain on site after isolation and earthing/shorting has been completed, and provide control measures e.g., RoLE equipment devices, as required by standards, k. Where required, plan and undertake briefing of site personnel as required, permit work activities near OLE and CRE, and manage permit to work documentation until cancellation, l. Where required, produce Work Package Plans (WPP), m. Resource all isolation staffing requirements by provision of sufficient competent resources to meet the Service Area's / Service Manager's target timescales for implementation / removal of an isolation, n. Provide all requisite Road Rail Vehicles (RRVs) to expedite isolation delivery, o. Produce walk-out packs as defined by the client, p. Provide approved isolation equipment to enable the safe isolation of OLE / CRE and be fully compliant with Network Rail's Life Saving Rules, q. Provide and check all task-specific equipment is fit for use and, where required, fully calibrated and registered, r. Produce methodologies and task briefings, s. Carry out the requisite Safe System of Work Pack planning in accordance with the relevant standards, t. Carry out electrical risk assessments, u. Maintain isolation diagrams and instructions up to date, v. Compliance with the provision of periodic (four weekly) Key Performance Indicator data and other data to support the monitoring of leading and lagging performance indicators linked to Network Rail's Electrical Safety Strategy, w. Provide on-site messing facilities where agreed with the Service Manager, x. Provide suitable and sufficient transport, y. Liaise with the Network Rail Electrical Control Room, z. Design, Planning and Installation of Permanent Earth Sections, aa. Where required, plan and implement Return Conductor (RC) Isolations, bb. Temporary Works Bonding, cc. Heights and Staggers Survey, dd. Condition Survey, ee. Structure Bonding Works. The above list is subject to change, e.g., legislation or NR standards or systems changes. Additional information: Please contact Suzanne.hall@networkrail.co.uk for further information.

Renewal: Three optional 12 month extensions.

Isolation & Associated Services - Wales & Western Region

The services could comprise of professional services, technical solutions, labour, and tools and equipment to deliver planning, design, delivery, hand back and maintenance in relation to isolation and construction services as outlined in the applicable standards. The framework suppliers shall undertake activities including, but not limited to, the following: a. Plan and implement an electrical safe system of work (isolation) taking account of the task(s), task delivery method(s), OLE/CRE infrastructure, the presence of residual electrical hazards and the required control measures, b. Review isolation diagrams and instructions, c. Plan and carry out pre-isolation walkouts as required by the relevant standards, d. Attendance, by competent persons, at interface meetings including Network Rail Possession meetings, isolation interface meetings and 'white board' reviews as required by The Service Manager, e. Liaison with third party isolation planners including Network Rail and its Principal Contractors, f. Liaison with, and co-ordination of, Network Rail and other isolation service providers where the Consultant is identified as the 'lead' isolation provider - this includes the management and submission of all paperwork required to implement the electrical safe system of work, g. Plan, complete and submit Isolation Details Forms (IDF) in accordance with the Service Area's published timescales, h. Identify earthing/shorting requirements, in accordance with the relevant standards, to provide safe working arrangements matched to the proposed task and task delivery activities and methodologies, i. Identify and facilitate the management of traction power electrical hazards, in addition to OLE/CRE, affecting work activities (e.g. traction return bonding; red bonds; nearby distribution feeders or equipment; outside parties' HV electrical supplies crossing the railway, etc.), j. Identify and record all residual electrical hazards that will remain on site after isolation and earthing/shorting has been completed, and provide control measures e.g., RoLE equipment devices, as required by standards, k. Where required, plan and undertake briefing of site personnel as required, permit work activities near OLE and CRE, and manage permit to work documentation until cancellation, l. Where required, produce Work Package Plans (WPP), m. Resource all isolation staffing requirements by provision of sufficient competent resources to meet the Service Area's / Service Manager's target timescales for implementation / removal of an isolation, n. Provide all requisite Road Rail Vehicles (RRVs) to expedite isolation delivery, o. Produce walk-out packs as defined by the client, p. Provide approved isolation equipment to enable the safe isolation of OLE / CRE and be fully compliant with Network Rail's Life Saving Rules, q. Provide and check all task-specific equipment is fit for use and, where required, fully calibrated and registered, r. Produce methodologies and task briefings, s. Carry out the requisite Safe System of Work Pack planning in accordance with the relevant standards, t. Carry out electrical risk assessments, u. Maintain isolation diagrams and instructions up to date, v. Compliance with the provision of periodic (four weekly) Key Performance Indicator data and other data to support the monitoring of leading and lagging performance indicators linked to Network Rail's Electrical Safety Strategy, w. Provide on-site messing facilities where agreed with the Service Manager, x. Provide suitable and sufficient transport, y. Liaise with the Network Rail Electrical Control Room, z. Design, Planning and Installation of Permanent Earth Sections, aa. Where required, plan and implement Return Conductor (RC) Isolations, bb. Temporary Works Bonding, cc. Heights and Staggers Survey, dd. Condition Survey, ee. Structure Bonding Works. The above list is subject to change, e.g. legislation or NR standards or systems changes. Additional information: Please contact Suzanne.hall@networkrail.co.uk for further information.

Renewal: Three optional 12 month extensions

Lot 2 North West and Central Region

Isolation and associated services

Lot 3 Wales and Western Region

Isolation and associated services

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-03df0e
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/067465-2026
Current Stage
Award
All Stages
Planning, Tender, Award

Procurement Classification

Notice Type
Planning Notice
Procurement Type
Framework
Procurement Category
Services
Procurement Method
Selective
Procurement Method Details
Negotiated procedure with prior call for competition
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

50 - Repair and maintenance services

65 - Public utilities

71 - Architectural, construction, engineering and inspection services


CPV Codes

50532400 - Repair and maintenance services of electrical distribution equipment

65320000 - Operation of electrical installations

71314100 - Electrical services

71334000 - Mechanical and electrical engineering services

Notice Value(s)

Tender Value
£376,000,000 £100M-£1B
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
16 Jul 20261 months ago
Submission Deadline
27 Nov 2024Expired
Future Notice Date
20 Oct 2023Expired
Award Date
1 May 20263 months ago
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

Tender Status
Complete
Lots Status
Active, Cancelled
Awards Status
Active
Contracts Status
Active

Contracting Authority (Buyer)

Main Buyer
Network Rail Infrastructure 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
LONDON
Postcode
SE1 8SW
Postcode Area
South East London
Country
England

Major Region (ITL 1)
TLI London
Basic Region (ITL 2)
TLI4 Inner London - East
Small Region (ITL 3)
TLI45 Lambeth
Delivery Location
Not specified

Local Authority
Lambeth
Electoral Ward
Waterloo & South Bank
Westminster Constituency
Vauxhall and Camberwell Green

Open Contracting Data Standard (OCDS)

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