A widespread radio system fault disrupts train services across southern England, prompting warnings of major delays for the rest of the day. Multiple outlets report that passengers are affected across broad parts of the rail network, with train operators issuing guidance that services may be significantly altered.

South Western Railway warns that services across its network may be cancelled, delayed by up to 90 minutes, or revised. Coverage also indicates that other operators are impacted, including Gatwick Express, Great Western Railway, Great Western Railway, and London Overground, with passengers across these services told to expect disruption.

The reports describe the issue as a fault affecting the rail communications system used to manage train movements. As a result, services are running with delays or are being changed to accommodate the disruption. Passengers are encouraged to check updates and plan for longer journey times while the fault is addressed.