A problem with overhead line equipment near Stratford caused the engineering overrun on the morning of Monday, November 26.
All lines have re-opened, but train operator Greater Anglia warned there would be some cancellations and delays.
The 6am and 6.25am from Liverpool Street to Norwich and the 8.30am and 9am from Norwich to Liverpool Street were cancelled.
The 6.35am train from London Liverpool Street to Southend Victoria, which was due in at 7.34am, was cancelled by Greater Anglia.
The company stated the cancellation was due to engineering works not being completed on time, meaning several trains between Shenfield and London were cancelled.