Major disruption on train services across the south

National Rail Enquiries say the issue relates to how train drivers and signallers communicate

Author: Neil Lancefield, Press Association Transport CorrespondentPublished 7th May 2026
Last updated 7th May 2026

Train services across southern England are being disrupted by a fault with a radio system.

National Rail Enquiries said the issue relates to how train drivers and signallers communicate.

It warned passengers that services may be delayed by up to 45 minutes or cancelled, and “major disruption is expected until the end of the day”.

The affected operators are CrossCountry, Gatwick Express, Great Western Railway, London Overground, Southern, South Western Railway (SWR) and Thameslink.

The incident was reported shortly before 9am on Thursday.

SWR warned that services across its entire network “may be cancelled, delayed by up to 90 minutes or revised”.

It went on: “Our operations and engineering teams are working with signallers to find and fix the fault.

“We do not have an ETA (estimated time of arrival) yet for when signalling will be back to normal.”

The operator advised passengers to consider using buses “while the fault is being investigated”.

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