---
title: "BT MGST - Private Circuit Emergency Overrun Service (PCEOS) Extension"
ocid: "ocds-h6vhtk-06e4a0"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06e4a0"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e4a0.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06e4a0.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "Transport for London"
published: "2026-08-14"
---

# BT MGST - Private Circuit Emergency Overrun Service (PCEOS) Extension

Buyer: Transport for London  
Current stage: Award  
OCID: ocds-h6vhtk-06e4a0

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## Summary

Transport for London procured the continued provision of BT’s Private Circuit Emergency Overrun Service (PCEOS) for the London Overground GSM-R railway communications network. The service supports safety-critical telecommunications links between train drivers, signallers and railway operational control functions. It maintains existing private circuits while Rail for London migrates from BT’s legacy Megastream platform to a replacement Nokia-based transmission solution. The requirement is for telecommunications maintenance and associated communications equipment services, including repair, maintenance and installation support. Delivery is for the London Overground network in the United Kingdom, with the buying organisation based at Transport for London in London. The service concerns an existing BT-operated infrastructure rather than a new network installation.

The procurement is complete and was awarded through a single-lot direct award under the utilities regime. Transport for London selected BRITISH TELECOMMUNICATIONS LIMITED, with the award dated 14 August 2026. The awarded value is £450,672 excluding VAT and £540,806 including VAT. The contract period runs from 14 August 2026 to 30 November 2026. The direct award was justified because BT owns and operates the Megastream infrastructure and proprietary technology supporting the existing circuits, making it the only supplier capable of maintaining the service. The stated basis was absence of competition for technical reasons, no reasonable alternative supplier and the need to preserve continuity of a safety-critical railway communications service during migration. The tender was above the relevant threshold.

This requirement is most relevant to large telecommunications providers or specialist rail communications businesses with the capability to maintain legacy carrier infrastructure and private circuits in a safety-critical operating environment. A credible competitor would need experience supporting GSM-R or comparable railway operational communications, including reliable links between mobile train crews, signalling teams and control centres. It would also need the technical ability to maintain, repair and install communications equipment, manage service continuity during platform migration, and work safely around railway operations. The award shows that Transport for London values continuity, infrastructure ownership or authorised access, proprietary-system expertise and demonstrable operational resilience. Suppliers without access to the incumbent Megastream infrastructure would face a substantial technical barrier on this specific requirement; future credibility would depend on offering an equivalent migration-compatible solution or relevant specialist capability.

## Notice

The contract is for the continued provision of BT's Private Circuit Emergency Overrun Service (PCEOS) supporting the London Overground GSM-R (Global System for Mobile Communications - Railway) network. The service maintains safety-critical telecommunications links used for communications between train drivers, signallers and railway operational control functions. The contract is required to ensure continuity of GSM-R services while Rail for London completes the migration from BT's legacy Megastream platform to a replacement Nokia-based transmission solution. BT is the only supplier capable of providing the service due to its ownership and operation of the Megastream infrastructure.

### Procurement Information

A Direct Award to BT plc is proposed as BT is the only supplier capable of providing the Megastream service that supports the London Overground GSM-R network. The service operates on BT-owned infrastructure and proprietary technology, and no alternative supplier can provide or maintain the existing circuits. The contract is required to maintain a safety-critical railway communications service whilst Rail for London completes migration to a replacement Nokia-based transmission solution. Failure to secure the service would create significant operational and safety risks through the loss of GSM-R communications between train drivers, signallers and railway operational control functions. The Direct Award is therefore justified due to the absence of competition for technical reasons, the lack of a reasonable alternative supplier, and the need to ensure continuity of a critical operational service until the migration programme is completed

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/077667-2026 |
| Notice type | UK5 - Transparency Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Direct |
| Procurement method details | Direct award |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 14 Aug 2026 |
| Submission deadline | Not specified |
| Future notice date | Not specified |
| Award date | 14 Aug 2026 |
| Contract period | 14 Aug 2026 - 30 Nov 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | £450,672 |
| 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 | Transport for London |
| Locality | LONDON |
| Postcode area | 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 | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | BRITISH TELECOMMUNICATIONS LIMITED |

## CPV Codes

### Divisions

- 50 - Repair and maintenance services
- 51 - Installation services (except software)

### Codes

- 50300000 - Repair, maintenance and associated services related to personal computers, office equipment, telecommunications and audio-visual equipment
- 51300000 - Installation services of communications equipment

## Release History

- 14 Aug 2026 at 12:45 - Award - UK5 - Transparency Notice - https://www.find-tender.service.gov.uk/Notice/077667-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/077667-2026
  14th August 2026 - Transparency notice on Find a Tender

## Notice URLs

- http://www.bt.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-06e4a0. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06e4a0.json.