Rail passengers faced delays and cancelled trains after a signalling failure caused several hours of disruption. All railway lines between Nuneaton and Birmingham New Street have since re-opened, ...
Southern and South Western Railway say trains are not running between Epsom and Dorking currently.
Trains may be cancelled, delayed or diverted until 09:00 GMT, National Rail says.
Technology trends continue to transform rail infrastructure, including digital signalling, predictive maintenance and connected systems.