Specialist train inspects overhead lines for c2c, London Overground
PANDAS-V technology used to identify potential faults before they cause disruption on key London routes.
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Passengers travelling on c2c and London Overground's Mildmay line may experience fewer disruptions following the use of specialist equipment to identify potential overhead line faults. A Greater Anglia train, equipped with PANDAS-V monitoring technology, travelled over both routes on two Sundays in July and August to assess the condition of their overhead electrical equipment.
The PANDAS-V system employs a roof-mounted camera and sensor to continuously monitor overhead lines. When a possible fault is detected, the system alerts Network Rail engineers, providing the precise location and a video clip. This allows for inspection and repair before a failure occurs, which can lead to prolonged railway closures if wires become tangled or fall onto tracks.
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Integration and Benefits
The inspection exercise was organised by GBR Anglia, which unites c2c, Greater Anglia, and Network Rail's Anglia region under a single leadership team. This integration is part of the preparations for Great British Railways. The PANDAS-V technology is not currently fitted to trains operating on the c2c or Mildmay lines, hence the use of an equipped Greater Anglia Class 720 train.
Within Greater Anglia's own network, the PANDAS-V system has reportedly helped engineers avoid significant disruption on 15 separate occasions since November 2025. The railway estimates this saved passengers approximately 22,000 minutes of delays during the first ten months of its use. Examples cited include an alert near Liverpool Street station that enabled the repair of a defect that could have rendered multiple platforms unusable, and a fault detected at Harlow Town that could have damaged the pantographs on passing trains, with each replacement costing around £25,000.
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The monitoring train also travelled along the Fen Line in late August to investigate suspected overhead line issues. Although no faults were identified, GBR Anglia stated that the inspection facilitated a quicker resumption of Great Northern services.
Future Deployments
In the coming months, two c2c trains are scheduled to be fitted with PANDAS-V equipment, which will enable daily monitoring of the railway line between Fenchurch Street and Shoeburyness. Until these trains are operational, an equipped Greater Anglia train will continue to make regular journeys over the c2c network. Further runs are also planned for the Mildmay and Fen lines.
During the trial journeys, the train also captured forward-facing video footage of the railway. An artificial intelligence system, known as AIVR, processed this footage to identify potential issues on or adjacent to the tracks. Similar monitoring equipment is increasingly being installed on passenger trains across the country, allowing for the inspection of thousands of miles of railway infrastructure during routine services.
This initiative is GBR Anglia in action. Being a joined-up railway, with track and train closely aligned, means we are able to embrace innovation and break down barriers more quickly and effectively.
Martin Beable, Chief Operating Officer for GBR Anglia
Martin Beable, Chief Operating Officer for GBR Anglia, commented on the initiative, stating that the integrated approach allows for faster adoption of innovation and removal of obstacles. He added that the successful deployment of technology across the region demonstrates the benefits of integration and suggests more improvements are forthcoming, aiming to reduce delays and enhance the passenger experience.
Questions this report answers
+What technology was used to inspect the overhead lines?
A specialist train fitted with the PANDAS-V monitoring technology was used. This system employs a roof-mounted camera and sensor to continuously monitor overhead electrical lines and detect potential faults before they cause disruption.
+Which lines were inspected by the specialist train?
The PANDAS-V equipped train inspected overhead lines on c2c and London Overground's Mildmay line during July and August. It also travelled along the Fen Line in late August.
+What are the expected benefits of this technology?
The PANDAS-V system aims to prevent serious disruption by identifying and allowing for the repair of faults before they fail. On Greater Anglia's network, it has reportedly helped prevent 15 instances of serious disruption since November 2025.
+When will c2c trains have this monitoring equipment?
Two c2c trains are scheduled to receive PANDAS-V equipment in the coming months. This will allow for daily monitoring of the c2c railway line between Fenchurch Street and Shoeburyness.
WE FILE
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The London Travel Desk assembled this report from the outlets listed below. Language-model drafting is reviewed under human editorial supervision, with scoring notes and corrections kept visible.
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