Over-running engineering works have caused chaos for tens of thousands early morning commuters heading to London at the end of Bank Holiday weekend.
Services running from King's Lynn in Norfolk, Cambridge and Stevenage in Hertfordshire were all affected.
First Capital Connect has put in place a reduced emergency timetable after dozens of train services were cancelled during the morning.
Network Rail was working on the line at Alexandra Palace in north London over the weekend and there were problems discovered after testing.
Click below to watch a report by ITV News Anglia's Olivia Paterson
More top news
Although we'll some some bright and sunny intervals it's going to a blustery day with gales likely at times across the south of the region.
It is going to be another windy night in store with outbreaks of rain- some heavy at times. Lows of 5 deg C.
Journalist parents from Norwich have received an apology from Tesco after they spotted two mistakes in a packet of baby suits