Keeping trains on track during the hot weather

Southeastern says IsoMat units can be installed in less than an hour.

A new type of technology is being trialled on the railway line between Tonbridge and Hastings to help keep trains running in hotter weather.

Southeastern has partnered with Flint Engineering to combat excessive heat in railway signalling cabinets, that can exceed 70C (158F).

Flint's IsoMat technology sees liquid within sealed channels inside the unit undergo a rapid cycle of evaporation and condensation, resulting in heat transfer.

David Davidson, chief operating officer for Southeastern, said: "As extreme weather events become more common, we need innovative solutions to protect our infrastructure, and most importantly keep our passengers and freight customers on the move."

Southeastern said when temperatures exceeded 70°C inside signalling cabinets it could lead to system failures, resulting in train delays, service disruptions and substantial maintenance costs.

The company explained that the IsoMat units require no power, maintenance or internal cabinet modifications, and could be installed in less than an hour.

The collaboration will see the technology deployed during the summer at 10 of the region's highest-risk cabinet locations in Kent and East Sussex.

Flint is also preparing to deliver an increased number of IsoMat units for deployment across more high risk cabinet locations in time for summer 2026.