By the time all the new trains are introduced at the end of 2020, there will be no traditional passenger trains of an engine and coaches left in East Anglia. (Image: Archant Norfolk 2015)
Train services between Norwich and Diss are returning to normal following a signalling failure earlier in the day.
It caused trains to run at a reduced speed and a number of services between London Liverpool Street and Norwich were cancelled.
Disruption is expected to continue until 4pm.
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