Notified Body

Railway Approvals appointed by the Department for Transport [DfT] as a Notified Body (No.1125) against EC directives 96/48/EC* ‘Interoperability of the trans-European High-speed rail system’ and 2001/16/EC* ‘Interoperability of the trans-European Conventional rail system’ (*subsequently modified by 2004/50/EC ‘Railways Amendment Directive’ and 2007/32/EC ‘Annex VI Railways Amendment Directive’).

Railway Approvals offers certification of new vehicles, replacement components, and interoperability components across a whole range of vehicle types. In Europe, and beyond, we have successfully managed many cross border projects relating to the design, modification, safety approvals and authorisation of locomotives and wagons.

This increases the value of assets by introducing existing vehicle types into new markets. Notified Body (NoBo) conformity assessment system is designed to ensure that any such certification work is carried out in accordance with The Railways (Interoperability) Regulations 2006 & the Railways Regulations 2007, the supporting guidance documentation produced by the DfT, Technical Specifications for Interoperability (TSI’s) and Notified National Technical Rules (NNTR).

We can undertake NoBo assessment and certification work within the scope of our appointment as follows:


  • Rolling Stock (Sub-systems & Constituents)
  • Associated NNTR’s and UK National Processes in the above High Speed area


  • Rolling Stock (Sub-systems & Constituents)
  • Noise (Sub-systems)
  • Associated NNTR’s and UK National Processes in the above Conventional area


  • Safety in Railway Tunnels (Sub-systems)
  • Passengers with Reduced Mobility (Sub-systems & Constituents)
  • Associated NNTRs and UK National Processes in the above Transverse areas


Railway Approvals can undertake certification of constituents and subsystems indicated above while making provision for the defined interfaces with other TSI, such as traine-borne Co-Co-Sig and Energy Constituents.

NoBo Certification work is undertaken in accordance with ISO/IEC17065 (requirements for bodies certifying products, processes and services) in order to work to the corresponding assessment modules in the TSI's.

This is summarised below:

ISO/IEC17065 Scope Conformity Assessment Module
Type Assessment SB
Product Verification SF
Quality System Approval SD
Full Quality Management System Approval with Design Assessment  SH1


Railway Approvals Accreditation - EPSF, RSSB, RISAB, UKAS