What Park Signalling does

Park Signalling Limited is a UK safety-critical railway signalling specialist that designs, manufactures and supplies proprietary hardware, firmware and software products and provides consultancy across their lifecycle. Founded in 1999/2000 by former key staff of Alstom Signalling — the team responsible for originating Solid State Interlocking (SSI) — the company operates from Houldsworth Mill, Reddish, Stockport, and is a wholly-owned subsidiary of Unipart Group within Unipart Technologies Group (UTG). Its certified SIL4 operating standard underpins a portfolio addressing approximately 40% of the UK rail network where SSI interlockings are deployed (around 450 sites in Great Britain).

The product catalogue is built around the SSI baseband data link and adjacent single-line control systems. Flagship offerings include DiBloC (a Network Rail-approved Digital Block Controller that controls a single-line section digitally or wirelessly without end-to-end cabling or on-board equipment), REMITdetect (a Remote Missing Telegram Detector monitoring up to 64 SSI data links), REMOSdl (a continuous-monitoring diagnostic tool for SSI baseband faults), the Technician's Terminal MT04S (a COTS-based Network Rail-approved replacement for obsolete Alstom/Westinghouse terminals), the DLIT data-link isolating transformer, and the ODLM optical data link module (in Network Rail product-approval trial in 2024). Adjacent safety-critical products include GateLock (an electronic worker-crossing lock co-developed with UTG sister company Instrumentel), TRAMSAFE (a low-cost GPS/INS-based tram vigilance system targeting UK Tramways), and joint-venture contributions to the Radio Electronic Token Block (RETB) Mark 2 system in Scotland alongside Comms Design and Telent. The company holds multiple Network Rail product approvals (notably DiBloC PA05/06721, catalogue 0086/002126), ISO 9001:2015, ISO 44001 (10 years certified), Cyber Essentials, RISQS, ROSPA Gold and CIRAS membership, and Investors in People accreditation.

Park Signalling earns revenue through a mix of hardware product sales, project contracts, ongoing maintenance contracts and technical consultancy, sold primarily direct to Network Rail and other government/transport-operator buyers (Transport for Greater Manchester, Rugby Signalling Control Centre). Go-to-market is enterprise B2B field sales led by Managing Director Marc Winterton (appointed November 2023) and Sales Director Chris Denyer (appointed October 2024), supplemented by trade exhibitions (Rail Live, Eurasia Rail), downloadable product sheets, a YouTube webinar channel and LinkedIn. The £3m Network Rail SSI Design Workstation contract announced January 2025 (completion targeted September 2026) is the largest single disclosed revenue event. The stated commercial strategy is to extend proprietary safety-critical control technology into adjacent verticals (utilities, mining, tunnelling, light rail/trams) and new geographies (notably African rail markets), supported by a doubling of Houldsworth Mill floorspace from January 2025.

Name

Park Signalling

Legal name

Park Signalling Limited

Website

https://park-signalling.co.uk

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Park Signalling, a UK Unipart Group subsidiary, designs and manufactures proprietary railway signalling hardware and software — including DiBloC, REMOSdl, MT04S and RETB — serving Network Rail and other operators across roughly 40% of the UK rail network's SSI interlockings.

Ownership category

akta.pro rank

Product category

Railway Signalling Systems

NAICS

Relay and Industrial Control Manufacturing (335314), Support Activities for Rail Transportation (48821)

SIC

Railroad Equipment (3743), Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Rail Signaling & Train Control Infrastructure (Interlockings, ETCS/CBTC Wayside) (TLAJADAB)

akta.pro secondary industries

Rail Signaling Control & Interlocking Operations (CBI/IXL/Interlockings) (TLAJAEAB), Rail Communications & Control Systems Operations (GSM-R/FRMCS, Radio Dispatch) (TLAJAEAG)

Keywords

• Railway signalling systems
• Solid state interlocking
• Digital block control
• Rail signalling consultancy
• Industrial control products

Headquarters

HQ city

Reddish

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Products (Hardware and Software): Design, manufacture and supply of signalling products for railway signalling, telecommunications and industrial control systems. Includes bespoke product development and prototype manufacturing through to final production.
2. Services and Consultancy: Technical consultancy service supporting the whole life cycle of products and systems, from concept to installation. Includes prototype equipment manufacturing, re-engineering, reverse engineering, repair and testing, calibration and certification.
3. Project Contracts: Major infrastructure contracts such as the £3m Network Rail contract to produce SSI Design Workstation (January 2025), with anticipated completion September 2026.
4. Maintenance Contracts: Ongoing maintenance contracts with major rail operators including Network Rail for SSI systems support.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Park Signalling designs, manufactures, and supplies a range of products for the worldwide railway signalling, telecommunications, and industrial control system industry. Its core offering centres on Solid State Interlocking (SSI) related hardware and software — including the DiBloC Digital Block Controller, REMITdetect, REMOSdl, the Technician's Terminal MT04S, DLIT and ODLM modules — alongside consultancy, application engineering, prototype manufacture, repair, and life-extension services for legacy signalling equipment. The company also delivers specialist systems such as RETB and TRAMSAFE for radio and tramway applications.

Product overview

Park Signalling is a railway signalling, telecommunications, and industrial control system company that designs, manufactures, and supplies a comprehensive range of products for the worldwide market. Their portfolio includes core products like the DiBloC (Digital Block Controller) for single line railway control, REMITdetect for monitoring missing telegrams, REMOSdl for SSI data link diagnostics, Technician's Terminal MT04S as a Network Rail approved replacement for obsolete SSI terminals, DLIT for data link isolation, ODLM for optical data transmission, GateLock electronic locking systems, TRAMSAFE tram vigilance systems, and Radio Electronic Token Block (RETB) signalling systems. Their product offering extends to add-on modules including SSI Link Analyser, Points Simulators, Remote Condition Monitoring, Virtual Lineside Signalling, and various protection equipment. They specialize in creating bespoke products with ground-breaking design and development, followed by prototype manufacturing and final production. The company also provides comprehensive services including design and development, application engineering, prototype manufacture, repair, and consultancy across the entire product and system lifecycle.

Differentiator

Problem solved

Functional benefit

Products and services

• DiBloC (Digital Block Controller) Network Rail approved system that allows a section of single line railway to be controlled without the need for end-to-end cabling or on-board equipment. Communicates digitally (optionally wirelessly) through IP-based systems with provision for TPWS and section signal release. Targeted at rail infrastructure operators needing low-cost single line block control.
• REMITdetect Remote Missing Telegram Detector system that monitors multiple SSI data links (up to 64), recording occurrences of missing reply telegrams and glitches, accessible via a simple web interface over Ethernet. For rail signalling engineers responsible for SSI system health monitoring.
• REMOSdl Diagnostic smart tool for SSI data link problems. Continuously monitors baseband links to eliminate the need for regular checking and provides faulting assistance when data link problems occur (e.g., following lightning strikes). For rail signalling maintenance teams managing SSI infrastructure.
• Technician's Terminal MT04S Network Rail approved replacement for obsolete Alstom/Westinghouse SSI Technician's Terminal, built using commercial off-the-shelf (COTS) components with a modern graphical user interface. Directly compatible at electrical interfaces and designed for rail signal engineers.
• DLIT (Data Link Isolating Transformer) Network Rail approved transformer that provides superior transmission characteristics with less signal loss than current units, used to electrically isolate baseband data link sections in AC electrified areas. Available in BR930 relay form factor and weatherproof housing variants. For rail signalling engineers in AC electrified territories.
• ODLM (Optical Data Link Module) Direct plug-and-play replacement for the standard SSI Data Link Module that transmits the SSI signal over optical fibres or copper cable, providing extreme immunity to electrical interference when optical fibres are used. For rail signalling operators needing interference-immune SSI data links.
• GateLock Manufactured gate and post solution with electronic locking system for use at worker crossings on the rail network. Developed in partnership with Instrumentel. For rail infrastructure operators managing worker safety at trackside access points.
• TRAMSAFE Low-cost tram vigilance system combining GPS and INS systems with a Virtual Lineside Signalling (VLS) concept for the UK Tramways industry. For tram operators seeking cost-effective driver vigilance and signalling solutions.
• Radio Electronic Token Block (RETB) Radio-based token block signalling system. Park Signalling provides the system design element for Mark 1 and Mark 2 RETB systems used on routes such as the Far North and West Highland lines in Scotland. For rail operators managing radio-block-signalled single line routes.
• SSI Link Analyser Standalone system for analysing SSI data links, used to diagnose telecoms faults and detect faulty data components including data link modules, isolating transformers, surge protection units, and cable faults. For rail signalling engineers performing SSI data link fault diagnosis.
• Points Simulators (SIM 101 / SIM 201) Training and simulation equipment (SIM 101 and SIM 201 variants) for points operations in railway signalling. For rail training providers and signaller competence development.
• Remote Condition Monitoring Standalone system for monitoring the condition of railway signalling infrastructure remotely. For rail asset management teams.
• Virtual Lineside Signalling Virtual lineside signalling solution for railway control systems, providing lineside signalling functionality without physical lineside equipment. For rail and tram operators deploying modern signalling concepts.
• Railway Signalling Consultancy & Engineering Services Technical consultancy and engineering services covering design and development, application engineering, prototype manufacture, repair, re-engineering, reverse engineering, testing, calibration, and certification across the whole life cycle of railway signalling products and systems. For rail operators and infrastructure owners needing specialist SSI signalling expertise and lifecycle support.
• SSI Design Workstation Bespoke Network Rail Design Workstation supporting Solid State Interlocking (SSI) signalling systems, replacing obsolete and unsupported technology. Provides rail engineers with hardware and software to test, configure and make changes to SSI interlockings. For Network Rail engineers maintaining the UK SSI estate.

Quantifiable outcome

• 40% of UK rail network uses SSI systems where Park Signalling is the expert
• +3 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Five partnerships are on record, tiered core and major.

• Unipart Technologies Group (UTG)coreStrategic or Co-development PartnerParent company of Park Signalling. Park Signalling is part of UTG alongside Comms Design, Instrumentel, MetLase, and Unipart Construction Technologies. UTG businesses design, develop and support performance improvement technologies for rail, utilities, aerospace, construction, engineering and manufacturing sectors.
• Comms DesigncoreStrategic or Co-development PartnerRadio partners within Radio Electronic Token Block (RETB) signalling systems. Collaboration on RETB systems being rolled out with Telent in Scotland.
• InstrumentelcoreStrategic or Co-development PartnerProvides on-board and lineside condition monitoring solutions. Park Signalling is working in partnership with them to develop GateLock - a manufactured gate and post solution with electronic locking system for worker crossings on Rail Network. Also collaborating on ThermOptic Insight lineside product.
• Unipart RailcoreStrategic or Co-development PartnerCollaboration on hardware and software solutions for global industry products including Track Circuit Assistor. Joint certification and ISO 44001 accreditation.
• TelentmajorTechnology or IntegrationCollaboration partner on RETB signalling systems in Scotland. Park Signalling provides system design element while Telent handles other aspects of the joint venture.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Hitachi Rail: Global rail signalling and interlocking provider (including legacy Ansaldo STS). Competes in interlockings, CBTC and ETCS — a broad incumbent with significant UK signalling presence.
• Alstom: Global rail signalling incumbent and the original developer of SSI, from whose staff Park Signalling was founded. Competes in interlockings, CBTC and ETCS but at significantly larger scale and across far broader product lines.
• Siemens Mobility: Major supplier of rail signalling, interlockings and ETCS-class train control globally. Overlaps with Park Signalling in interlocking, point and wayside signalling markets.
• Thales: Provides rail control, signalling and ETCS solutions worldwide. Overlaps with Park Signalling's interlocking and train-control focus as part of a much larger transport portfolio.
• Vossloh: Rail infrastructure group with rail signalling and rail fastening products, serving European rail markets. Broader portfolio but overlapping signalling and wayside equipment focus.

Direct peers

• Sella Controls: UK-based specialist in rail signalling, safety-critical control systems, and level-crossing products — closely matching Park Signalling's niche of bespoke signalling hardware and consultancy for the British rail industry.
• Schweizer Electronic: Swiss specialist in level-crossing safety, interlocking components and ETCS onboard equipment — a niche signalling hardware manufacturer comparable to Park Signalling's specialist profile.
• Frauscher Sensor Technology: Austrian specialist in rail axle counters, wheel detection and signalling sensors. Comparable specialist supplier focused on railway trackside detection and signalling components.
• Mors Smitt (Knorr-Bremse): Manufacturer of safety relays, signalling components and rolling-stock electronics for the rail industry — overlap with Park Signalling's relay/control hardware portfolio.
• Pintsch: German specialist in level-crossing systems, interlockings and rail signalling components — directly comparable niche signalling-equipment manufacturer serving rail operators.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/park-signalling
• Xx.com/UnipartRail

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Park Signalling