---
title: "Overhaul of Jumpers for S Stock Metropolitan Line Fleet"
ocid: "ocds-h6vhtk-06633f"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06633f"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06633f.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06633f.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "LONDON UNDERGROUND LIMITED"
published: "2026-06-04"
---

# Overhaul of Jumpers for S Stock Metropolitan Line Fleet

Buyer: LONDON UNDERGROUND LIMITED  
Current stage: Award  
OCID: ocds-h6vhtk-06633f

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## Summary

The procurement process, led by London Underground Limited and facilitated by Transport for London, pertains to the overhaul of the Jumper system for the S Stock Metropolitan Line Fleet. The buying organisation is based at 5 Endeavour Square, London, covering services within the railway and fleet management industry. The process followed a direct procurement method, resulting in a contract awarded to AB Connectors Limited, a large supplier from Rhondda Cynon Taff. The procurement stage is currently at award, with the contract period running from 26th June 2026 to 1st August 2029. The total contract value is £1,061,604 gross and covers essential maintenance services that have not been addressed since the fleet's introduction 16 years ago.

This tender presents a significant opportunity for businesses involved in railway systems and fleet maintenance, particularly those with expertise in high-safety cable connections and electronic systems compatible with existing London Underground infrastructure. As the contract involved a direct award due to technical complexity and the necessity for integration with existing systems, businesses offering similar services may seek to establish relationships for future opportunities. Companies with experience in specialised engineering, maintenance, and high-security railway operations would be well-positioned to compete in this domain.

## Notice

This procurement covers the overhaul of the Jumper system (including parts & labour) on the London Underground Metropolitan line trains, required to renew the jumper system compliance and to support the fleet overhaul activities. The jumpers are bespoken to the Metropolitan line fleet and have not been replaced since the fleet's introduction, approximately 16 years ago, hence are now due for overhauls in line with the train management regime. The design, manufacture and ad hoc repairs on the Metropolitan line Jumper system has been carried out by the Original Equipment Manufacturers - AB Connectors (a subsidiary of TT Electronics), from the time of the fleet's procurement, so there would be a continuity of supply from the time of introduction of these components by using the current supplier.

### Procurement Information

Additional or repeat goods, services or works - extension or partial replacement. The jumper system is a critical high safety and high reliability cabling connection that electrically and electronically link adjacent cars, enabling seamless and integrated transfer of power and communication signals throughout the train. This integration allows for safeguarding and coordinated control of various onboard centralised functional systems such as lighting, HVAC, door operations, passenger information, safety systems and diagnostic functions. The technical specifications for Jumper parts and overhaul services are developed strictly to ensure proportionate compatibility with these existing systems. Given the inherent complexity of this specification, TfL does not have the technical information to specificity of jumpers to manage its compatibility with the aforementioned systems, if sourced from alternative supplier; and without validated requirement specifications, supporting assurance documentation, or the necessary testing equipment on-site, TfL have no baseline for verification or benchmarking of alternatively sourced jumper. Therefore, an introduction of these jumpers, aside disproportionate maintenance risks, could cause unresolvable in-service failure and malfunctions (in both communication and power transfer) to and of the critical functions - lighting, train doors, HVAC, safety systems, etc - described above, which severely risks passenger and infrastructure safety. Consequently, TfL cannot assure or safely deploy an alternative solution, as trains cannot enter service without fully functional, compatible and compliant cabling systems which are essential to maintaining both reliability and safety. Hence, the justification for awarding this proposed contract as a direct award without competition is in accordance with Schedule 5, paragraph 7 of the Procurement Act 2023, given the technical complexity of the jumper system and (a) a change in supplier would result in the contracting authority (London Underground) receiving overhauled jumper systems that are different from, or incompatible with, the existing goods, services or works, and (b) the difference or incompatibility would result in disproportionate technical difficulties in operation or maintenance.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/052869-2026 |
| Notice type | UK6 - Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Planning, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 4 Jun 2026 |
| Submission deadline | Not specified |
| Future notice date | 9 Mar 2026 |
| Award date | 30 Mar 2026 |
| Contract period | 25 Jun 2026 - 1 Aug 2029 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £1,000,000 |
| Lots value | Not specified |
| Awards value | £884,670 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Pending |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | LONDON UNDERGROUND LIMITED |
| Additional buyers | TRANSPORT FOR LONDON |
| Locality | LONDON |
| Post town | East London |
| Postcode | E20 1JN |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI4 Inner London - East |
| ITL 3 | TLI41 Hackney and Newham |
| Local authority | Newham |
| Electoral ward | Stratford Olympic Park |
| Westminster constituency | Stratford and Bow |
| Delivery location | TLI London |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | AB CONNECTORS |

## CPV Codes

### Divisions

- 34 - Transport equipment and auxiliary products to transportation
- 50 - Repair and maintenance services

### Codes

- 34600000 - Railway and tramway locomotives and rolling stock and associated parts
- 50111000 - Fleet management, repair and maintenance services

## Release History

- 4 Jun 2026 at 13:31 - Award - UK6 - Contract Award Notice - https://www.find-tender.service.gov.uk/Notice/052869-2026
- 30 Mar 2026 at 09:06 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/028901-2026
- 5 Mar 2026 at 15:01 - Planning - UK1 - Pipeline Notice - https://www.find-tender.service.gov.uk/Notice/020005-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/052869-2026
  4th June 2026 - Contract award notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/028901-2026
  30th March 2026 - Transparency notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/020005-2026
  5th March 2026 - Pipeline notice on Find a Tender

## Notice URLs

- http://www.ttabconnectors.com
- 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-06633f. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06633f.json.