The issue was first reported at around 7.48am and has since escalated, with all lines now blocked between the two stations. Routes on multiple lines into London Liverpool Street are impacted, including services to and from Norwich, Ipswich, Clacton, Colchester Town, Braintree, and Southend Victoria. Passengers are being warned that trains may be cancelled, delayed, or revised, with disruption expected to continue until further notice. Greater Anglia tickets are being accepted on Elizabeth line services between Liverpool Street and Shenfield, as well as on C2C services between London Fenchurch Street and Southend Central. Customers with advance tickets can use earlier or later services if their booked train is cancelled.