3rd Line Support for the Maintenance of the London Overground WestCAD & SSI Interlocking

Transport for London
London
Direct award
24 April 2025 to 31 July 2026

Provision of 24/7 diagnostic hotline support, operational spares, and expert hardware and software engineering for the WestCAD signalling control and display system and Solid-State Interlocking. This service acts as an escalation point for faults that cannot be rectified by local maintenance teams on the London Overground Core Windrush Line.

Open the official notice

Awarded value: £135k; As published
Published: 24 April 2025
Awarded: 24 April 2025; Siemens Mobility Ltd
Contract length: 15 months; Ends 31 July 2026

What the contract covers

Provision of specialist third-line technical support and maintenance services for railway signalling control systems and interlocking hardware.

Terms and requirements

Procedure: Direct award
Initial term: 15 months
Contract dates: 24 April 2025 to 31 July 2026
Certifications asked for: None stated
Lots: 1
Suitable for SMEs: Not stated
CPV codes: 50000000

Services in this contract

Rail electrification and signallingMain service£512k typicalThird line support and maintenance of signalling control and interlocking systems

Lifecycle

Published
24 April 2025
Contract awardedto Siemens Mobility Ltd
24 April 2025
Contract starts
24 April 2025
Contract ends
31 July 2026

The buyer

Transport for London

Type: Locked
Contracts, 24 months: Locked
Recorded value: Locked
Typical contract: Locked
Railway signalling contracts, 24 months: Locked

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Contact details

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The supplier

Siemens Mobility Ltd

Contracts won, 24 months: Locked
Value won, 24 months: Locked
Buyers, 24 months: Locked
Size: Locked
Companies House number: Locked

Main buyers

Contact details

Email: Locked
Website: Locked

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Cite this contract

Link: https://bidskim.com/tender/320885/3rd-line-support-for-the-maintenance-of-the-london-overground-westcad-and-ssi-in
Buyer reference: WS2371076555
Open contracting ID: ocds-h6vhtk-0506f8
Last checked: 5 November 2026

Transport for London. 3rd Line Support for the Maintenance of the London Overground WestCAD & SSI Interlocking. Contract award, 24 April 2025. BidSkim, https://bidskim.com/tender/320885/3rd-line-support-for-the-maintenance-of-the-london-overground-westcad-and-ssi-in (accessed 5 November 2026).