A signalling failure at London Bridge is causing major disruption to services, including to those running via St Albans district.

Services may be cancelled or delayed by up to 45 minutes and the disruption is expected to last until 9pm tonight.

Tickets will be valid on London Underground services via any reasonable route; Southern, Thameslink and Great Northern services; Croydon Tramlink services between Beckenham Junction and Wimbledon; South Western Railway services via any reasonable route; Southeastern services between London and Tonbridge; London Overground services via any reasonable route; TfL London Buses via any reasonable route; Metro Buses services via any reasonable route; and Great Western Railway services between Gatwick Airport and Reigate.

To follow the incident on Twitter, search for #LondonBridge