GTR, Siemens ETCS Upgrade: Digital Rail Innovation on UK’s ECDP
GTR and Siemens Mobility complete the **ETCS upgrade** of all Class 717 trains. This **railway** enhancement boosts operational capabilities on the Northern City Line.

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Introduction
Govia Thameslink Railway (GTR) and Siemens Mobility have completed the upgrade of all 25 Class 717 trains to European Train Control System (ETCS) version 3.6.0. This enhancement improves operational capabilities on the Northern City Line between Finsbury Park and Moorgate in London, which is part of the East Coast Digital Programme (ECDP).
Project Overview
GTR, in partnership with Siemens Mobility, has upgraded its entire fleet of Class 717 Great Northern trains. The upgrades enable these trains to operate in passenger service using an updated version of ETCS. The trains now run on the Northern City Line between Finsbury Park and Moorgate using ETCS Baseline 3, Release 2, also known as version 3.6.0.
Technical Specifications
The upgraded ETCS specification allows for enhanced operational flexibility in high-traffic areas. It connects trains to the trackside via GPRS instead of GSM-R. This upgrade is a component of the government-funded ECDP and is intended to accommodate high service frequency on the East Coast Mainline.
Industry Impact
Aaron Meakin, GTR’s Senior Programme Delivery Manager, stated that innovations on the Northern City Line are paving the way for in-cab digital signalling on the wider UK network. Richard Cooper, Infrastructure Lead and ECDP Project Director at Siemens Mobility, highlighted the successful upgrade of the Siemens-built Class 717 fleet, which marks a significant step in transforming rail travel. Jonathan Daniels, Network Rail’s ECDP Integration Lead, noted that the entire GTR Class 717 fleet was upgraded to the new ETCS baseline level within three months.
Collaborative Efforts
The project demonstrates a successful collaboration between train operators, infrastructure providers, and technology developers. This partnership aims to improve reliability, capacity, and safety for passengers on a busy commuter route.
Conclusion
Govia Thameslink Railway and Siemens Mobility have upgraded all Class 717 trains to ETCS version 3.6.0. This project, which uses ETCS Baseline 3, Release 2, enhances operational capabilities on the Northern City Line and is part of the East Coast Digital Programme.
Last June 2025, we published an article about Renfe’s Aranjuez maintenance hub. Click here to read – Future of Rail: Renfe’s Railway Technology Hub, Aranjuez: Essential Guide
Company Summary
Govia Thameslink Railway (GTR): A train operating company.
Siemens Mobility: A provider of transport solutions.
Network Rail: An infrastructure provider.
Technology
European Train Control System (ETCS): A signalling and control system for railways.
GPRS: General Packet Radio Service
GSM-R: Global System for Mobile Communications – Railway
East Coast Digital Programme (ECDP): A government-funded initiative.
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