Guidance

Railway interoperability: National Technical Specification Notices (NTSNs)

UK railway technical standards, known as NTSNs, have replaced EU technical specifications for interoperability (TSIs).

• From: Department for Transport
• Published: 31 December 2020
• Last updated: 22 March 2022 — See all updates

Applies to England, Scotland and Wales

Documents

National Technical Specification Notices (NTSNs)

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NTSN: Safety in Railway Tunnels (SRT)

ODT, 136 KB

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NTSN: Control, Command and Signalling (CCS)

ODT, 257 KB

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NTSN: Operation and Traffic Management (OPE)

ODT, 252 KB

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NTSN: Infrastructure (INF)

ODT, 411 KB

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NTSN: Energy (ENE)

ODT, 208 KB

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NTSN: Rolling Stock – Locomotive and Passenger (LOCPAS)

ODT, 512 KB

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NTSN: Rolling Stock – Noise (NOI)

ODT, 87.4 KB

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NTSN: Rolling Stock Freight Wagons (WAG)

ODT, 810 KB

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NTSN: Persons with Reduced Mobility (PRM)

ODT, 333 KB

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NTSN: Telematics Applications for Passenger Services (TAP)

ODT, 128 KB

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NTSN: Telematic Applications for Freight (TAF)

ODT, 137 KB

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NTSN: Assessment and further assessment of ICs

ODT, 72.1 KB

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NTSN: Modules for the procedures for assessment of conformity or suitability for use and UK verification

ODT, 105 KB

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Details

A new domestic railway technical standards regime will replace the EU’s Technical Specifications for Interoperability (TSIs) while preserving their technical content. These National Technical Specification Notices (NTSNs) have been published by the Secretary of State for Transport pursuant to regulation 3B of the Railways Interoperability Regulations 2011 and have effect from 1 January 2021. They are applicable in Great Britain only.

The Department for Transport (DfT) worked with the Rail Safety and Standards Board (RSSB) to create the National Technical Specification Notices (NTSNs). Track change versions show how the NTSNs differ from the corresponding TSIs.

Published 31 December 2020
Last updated 22 March 2022 + show all updates

1. 22 March 2022

   Infrastructure NTSN updated to include missing text in clause about rail fastening systems and remove redundant clause on abrupt change of cant deficiency. Safety in railway tunnel updated to include clauses on operation subsystem and operation of new rolling stock in existing tunnels.

2. 31 December 2020

   First published.