---
title: "Allerton OHLE Isolations"
ocid: "ocds-h6vhtk-0678a2"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-0678a2"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-0678a2.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-0678a2.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "NORTHERN TRAINS LTD"
published: "2026-03-31"
---

# Allerton OHLE Isolations

Buyer: NORTHERN TRAINS LTD  
Current stage: Award  
OCID: ocds-h6vhtk-0678a2

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## Summary

Northern Trains Ltd, a public authority central government entity located in York, United Kingdom, has recently completed the award stage of a procurement process titled "Allerton OHLE Isolations". This contract involves the design and construction of overhead line equipment (OHLE) isolations at the Allerton Train Care Centre. The procurement process, which began as a tender, was carried out under a limited competition method, specifically a "Below threshold - limited competition" regime targeted at the utilities sector. The contract was signed on 25 March 2026, and the active contract runs from 26 March 2026 until 2 September 2026, with a potential extension to 2 November 2026. The project focuses on construction, overhead line construction, and electrical installation works, classified under CPV codes 45000000, 45232210, and 45310000, respectively.

This tender presents substantial growth opportunities for businesses in the construction and rail industry, especially those specialising in electrical installations and overhead line systems. Large-scale enterprises like Aureos Rail Ltd, which was awarded the contract, are well-positioned to benefit due to the project's scope and complexity. The successful bidder will engage in significant infrastructural development within the rail network, which may lead to further collaboration with public transport authorities and additional projects requiring similar expertise. The opportunity to design and implement innovative solutions within specified Network Rail Standards enhances a company's portfolio, fostering potential long-term relationships with prominent railway operators.

## Notice

Northern Trains Ltd, is a Train Operating Company (TOC) that operates passenger rail services within the north of England. Northern Trains Ltd is publishing this notice to establish a contract to design and construct OHLE isolations that is present on roads 1-3 in the maintenance shed at Allerton Train Care Centre. The Scope of requirements for design shall be to develop the designs to AFC status standard in accordance with the relevant Network Rail Standards and to provide a submission to NWR for Engineering Assurance. The Scope of requirements for Construction shall be to implement the designs across the OHLE that is present on roads 1-3 in the maintenance shed at Allerton. This project seeks to provide the ability for the TCC to isolate the OHLE quickly and safely within the maintenance shed when high level access is required on the units within the shed. The existing isolators are manually operated MLE 1250A designs with earth position to the current design. The manual operating gear will be removed and be replaced with motor units. New support steelwork will be required to support the motors. The operating tubes from the motor units to the switch / outpost bearings will be replaced with types with universal joints, as the position of the drive on the motor unit is different from that for the manual operating gear. Each isolator moving contact will be fitted with a limit switch assembly, which will be connected to the motor units. The OLE contractor will run the cables from the switches to the motor units but not terminate them. On completion of the installation of the motor unit and limit switch assembly a functional test will be performed to check correct operation. The Depot Protection System [DPS] contractor will need to be attend the test. Additional traction bonds may be required from the earth posts of the isolators to traction return, i.e. duplicate traction bonds. Form A/B, AFC and As Fitted designs will be required for the OLE modifications. A site survey will be required. An IDC will be required with the DPS designer / contractor. Amendments will be required to the Network Rail isolation diagram and possibly the isolation instructions. The depot local isolation instructions will require revision. An IDC with Network Rail and the depot isolation staff will be required. The following assumptions and clarifications apply to scope. * OHLE contractor will act as principal Designer and contractor. * OHLE contractor will engage with DPS system specialist. * The DPS contractor will produce the LV and SCADA/control wiring design, including that from the motor units to the limit switched mounted on the isolators. * CAD cross sections will be obtained from NWR for the two switching structures. * OLE isolations, including planning, will be coordinated between depot and NWR isolation Team. * Coordination of works and access to site will be coordinated with depot management and all. The nature of the arrangement is that works will be supplied under a JCT Intermediate Works with contractors Design (2016). Where used throughout this notice, the meaning of Train Operating Companies includes all and any of those train operating companies who, currently or in the future, provide services for the carriage of passengers by railway: under a franchise agreement with the Secretary of State within the meaning of section 23(3) of the Railways Act 1993 or under, or secured under, the Secretary of State's duty in section 30(1) of the Railways Act 1993; or in accordance with legislation which supersedes or amends the powers referred to in a) and b), including where such powers are transferred from the Secretary of State to another body. The list of current providers of services for the carriage of passengers by railway under these provisions can be found at https://www.gov.uk/guidance/public-register-of-rail-passenger-contracts. Novation or Assignment The contract may be novated or assigned by Northern trains Limited to Train Operating Companies, or to DFT Operator Limited (company number: 07141122) or any successor parent company to a Train Operating Company, following a corporate restructuring or similar circumstance. Other Information NTL expressly reserves the right: not to award any suppliers the contract referred to in this notice; and in no circumstances will the customer be liable for any costs incurred by the suppliers. For more information about this opportunity, please visit the Delta E-Sourcing Portal at: https://www.delta-esourcing.com/38ZA9F66Y2 For more information about this opportunity, please visit the eSourcing portal at: https://www.delta-esourcing.com/tenders/UK-UK-York:-Construction-work./38ZA9F66Y2 To respond to this opportunity, please click here: https://www.delta-esourcing.com/respond/38ZA9F66Y2

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/029458-2026 |
| Notice type | UK7 - Contract Details Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Limited |
| Procurement method details | Below threshold - limited competition |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 31 Mar 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 25 Mar 2026 |
| Contract period | 26 Mar 2026 - 2 Sep 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £240,527 |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NORTHERN TRAINS LTD |
| Locality | YORK |
| Post town | York |
| Postcode | YO1 6JT |
| Country | England |
| ITL 1 | TLE Yorkshire and The Humber |
| ITL 2 | TLE2 North Yorkshire |
| ITL 3 | TLE21 York |
| Local authority | York |
| Electoral ward | Micklegate |
| Westminster constituency | York Central |
| Delivery location | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | AUREOS RAIL |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45000000 - Construction work
- 45232210 - Overhead line construction
- 45310000 - Electrical installation work

## Release History

- 31 Mar 2026 at 09:16 - Award - UK7 - Contract Details Notice - https://www.find-tender.service.gov.uk/Notice/029458-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/029458-2026
  31st March 2026 - Contract details notice on Find a Tender

## Notice URLs

- https://www.delta-esourcing.com/38ZA9F66Y2
- https://www.delta-esourcing.com/respond/38ZA9F66Y2
- https://www.delta-esourcing.com/tenders/UK-UK-York:-Construction-work./38ZA9F66Y2
- https://www.gov.uk/guidance/public-register-of-rail-passenger-contracts
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## 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-0678a2. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-0678a2.json.