National Technical Specification Notices (NTSNs) Conformance

We have experience of working with UK Approved Bodies (formally Notified Bodies) to ensure that key legal compliance evidence through design and production are captured in accordance with the requirements of the National Technical Specification Notices (NTSNs) to assist in the development of the UKAP Assessment Files (Technical File).


Furthermore we are then able to prepare the Technical File accompanying the EC Declaration of Verification (ECDV-TF) ensuring that the system is not only designed and built to meet technical requirements, but that it is operationally ready and maintainable.

We have helped our clients with:

  • Development of Project Authorisation Strategies
  • Generation of NTSN / TSI Compliance Matrices
  • Development of Compliance Statements and evidence referencing
  • Declaration of Verification (DoV) development
  • Development of Technical Files that support the Declaration of Verification (ECDV-TF)
  • Liaison with the National Safety Authority, the Office of Rail and Road (ORR) in the UK
  • Liaison with Assurance and System Review Panels
  • Liaison with UK Approved Bodies / Notified Bodies

Project Examples

Transpennine Route Upgrade

We are working closely with Transpennine Route Upgrade Design and Build teams to ensure that suitable and sufficient compliance information is provided against the Infrastructure, Energy and People with Reduced Mobility NTSNs to support Authorisation for Placing into Service.

Cricklewood Sidings

We have simplified the application of the Infrastructure NTSN for the Cricklewood Sidings Redevelopment Railway Systems scope of works and developed a clear strategy on what information is being provided to the Brent Cross New Stations team to support their Authorisation submission to the ORR.

For more information

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