Services — Signalling & Rail Interfaces Ltd
What We Do

Specialist Rail Consultancy Services

We deliver independent, expert technical services across the full rail project lifecycle — from initial concept through to operation and beyond.

Rail Signalling

Core Service

Rail Signalling

Our signalling consultants bring hands-on project experience across a wide range of railway types and technologies. We support clients at every stage — from outline design and feasibility through to detailed design review, verification and independent assurance.

We work across conventional lineside signalling as well as modern train protection and traffic management systems, ensuring our advice is grounded in practical delivery knowledge.

  • Signalling design review and independent checking
  • ETCS, CBTC and ATP system expertise
  • Traffic management and operations planning
  • Conventional lineside signalling — UK and international standards
  • Signalling principles, layout and scheme design
  • Level crossing risk assessment and design
Systems Integration

Core Service

Systems Integration

Rail projects bring together multiple technical disciplines — signalling, rolling stock, infrastructure, power, telecommunications and control — each with their own requirements and standards. Poorly managed interfaces are a leading cause of project delay and cost overrun.

We provide independent systems integration expertise to help clients identify, manage and close interface risks before they become programme issues.

  • Interface requirements management
  • Signalling and rolling stock compatibility assessment
  • Systems integration planning and test strategy
  • Interface Control Documents (ICDs) and register management
  • Cross-discipline technical coordination
  • Stakeholder and supplier interface facilitation
Safety Assurance

Core Service

Safety Assurance

Safety is non-negotiable in rail. Our safety assurance team provides rigorous, independent assessment of safety cases, hazard analyses and functional safety deliverables — giving clients and regulators the confidence they need.

We are experienced in working within both UK and international regulatory frameworks, including the Common Safety Method (CSM) and relevant EN standards.

  • Preliminary Hazard Analysis (PHA) and System Hazard Analysis (SHA)
  • RAMS — Reliability, Availability, Maintainability and Safety studies
  • Functional safety review to EN 50126, EN 50128, EN 50129
  • Safety case development and independent assessment
  • Common Safety Method (CSM) support
  • Risk acceptance and ALARP demonstrations
EN 50126 EN 50128 EN 50129 CSM IEC 61508 UK RSSB Standards
Technical Advisory

Core Service

Technical Advisory

Procurement decisions, contract strategies and technical specifications set the foundation for every rail project. Getting these wrong early is costly to fix later. We provide clients with the independent technical insight they need to make sound decisions.

Our advisory work spans feasibility studies, procurement support, technical due diligence and expert witness services — working for operators, funders, contractors and regulators alike.

  • Technical specification development
  • Tender evaluation and supplier assessment
  • Feasibility and options studies
  • Technical due diligence for funders and investors
  • Contract and programme technical review
  • Expert witness and dispute resolution support

How We Work

Our approach is structured, transparent and tailored to each client engagement.

01

Understand

We take time to understand your project, programme, constraints and objectives before we begin — so our advice is always relevant and actionable.

02

Assess

We apply rigorous technical analysis, drawing on experience across international rail standards and project delivery environments.

03

Advise

We provide clear, independent advice — written for your audience, whether that is a project team, a board or a regulator.

04

Support

We remain available to support implementation, respond to queries and adapt our engagement as your project evolves.

Technical Disciplines

Our consultants hold expertise across a broad range of railway signalling and systems disciplines.

ETCS / ERTMS

European Train Control System design, assessment and integration across all application levels.

CBTC

Communications-Based Train Control for urban metro and automated transit systems.

Interlocking & Control

Relay and solid-state interlocking design, review and testing — UK and international types.

ATP & Train Protection

Automatic Train Protection, AWS, TPWS and equivalent national systems.

Traffic Management

TMS and operational planning for complex rail networks.

Level Crossings

Risk assessment, design review and compliance for all crossing types.

Telecoms & SCADA

Trackside communications, GSM-R, GSMR migration and SCADA systems.

Rolling Stock Interface

Signalling compatibility assessment for new and modified rolling stock.

Functional Safety

Safety-critical software and hardware assessment to IEC 61508 and EN standards.

Discuss Your Project With Us

Whether you need independent assurance, procurement support or specialist signalling expertise, we are ready to help.

Get in Touch