The trespasser was reportedly on the line between Shenfield and Chadwell Heath and trains had been being run at considerably slower speeds, Greater Anglia stated.
READ MORE: Suffolk and Essex Traffic and Travel News
Network Rail’s response group and the police handled the incident.
The mainline stops in Ipswich and Stowmarket in each instructions and cancellations to companies had already disrupted travellers.
READ MORE: Transport
The 1.02pm practice from London Liverpool Street to Ipswich began from Chelmsford and didn’t name at London Liverpool Street, Stratford and Shenfield.
The 12.02pm practice was delayed and the 11.53am service from Ipswich to London was terminated at Colchester.
