Rail passengers are 'not satisfied' with Great Anglia or First Capital Connect, a new survey by Which? has found.
Thousands of commuters have been affected by major signalling problems this morning on the Greater Anglia line.
The rail operator Greater Anglia says it's been a positive first 15 months with progress in punctuality and customer satisfaction.
Disruption on Greater Anglia services caused by overhead line problems has been resolved.
The problems caused suspensions between Bishop's Stortford and Hertford East into London Liverpool Street. The Stansted Express was also suspended.
Greater Anglia say services are recovering well but they warn that there could be minor delays until mid-afternoon.
An investigation is continuing into a low-speed train crash at Norwich station which left eight people with minor injuries. The investigation is being led by the Rail Accident Investigation Branch.
The Greater Anglia service from Great Yarmouth collided with an empty East Midlands train at the platform at around 12:25 on Saturday morning. 31 passengers were on board.
Watch Serena Sandhu's report on this morning's train crash at Norwich Station:
All eight passengers who were injured in a low-speed train crash at Norwich Station have now left hospital.
A spokesman for the Norfolk and Norwich Hospital said the passengers had received minor injuries. One man who was kept in overnight has now been sent home.
"Last night the 23.34 Great Yarmouth to Norwich service struck an empty, stationary train on arrival at Norwich station. The train arriving at Norwich was travelling at very slow speed.
There were 31 passengers on board. Eight passengers have sustained injuries which are being described as minor.
Our first priority has been and remains the welfare of the passengers and traincrew involved. An investigation into the incident led by the Rail Accident Investigation Branch (RAIB) is underway and we are assisting them with their enquiries."
Both trains involved in a crash at Norwich station today "remained upright and on the tracks", the British Transport Police (BTP) has confirmed.
A spokesman for the BTP said: "The collision took place at very slow speed and both trains remained upright and on the tracks.
"Eight passengers have sustained injuries which are being described as minor.
"An investigation has been launched, enquiries are ongoing to establish the full circumstances surrounding the incident.
"Anyone with any information which can assist the investigation is asked to contact British Transport Police on Freefone 0800 40 50 40, or text 61016."
Eight passengers have suffered minor injuries after a low-speed train crash at Norwich station.
The crash happened at around 12.25am on Sunday.
The 23:34 Greater Anglia Train from Great Yarmouth to Norwich collided with a stationary East Midlands train, which was already in the station.
There were 31 passengers on board the Greater Anglia train, plus the driver and conductor. It's thought that 8 passenger received minor injuries.
Were you on board the train? Call the newsdesk on 084488 16818.
Passengers using Greater Anglia trains appear to be satisfied with the service. That is according to the first annual report since the Dutch company Abellio was awarded the franchise.
In a national survey last autumn, 83% of travellers said they were satisfied. While the report shows the number of trains arriving on time has increased, the rail operator recognises that it still needs to make further improvements.
Disruption on Greater Anglia between Liverpool Street and Cheshunt, and between Liverpool Street and Hertford East due to overhead line problems between Southbury and Cheshunt.