The new trains introduced on Greater Anglia's rural routes were not the cause of the signalling problems that have plunged services into chaos over the last few weeks, the company said today.
Passengers travelling between Norwich and Cambridge suffered the worst punctuality in the region in February as one in five trains arrived late.
A weather warning remains in place because of Storm Gareth, with the potential for gusts of up to 60mph in Norfolk today (Wednesday).
Train services between Norwich and north Norfolk were disrupted this morning after a lorry damaged a railway bridge.
A Norfolk MP has criticised Network Rail for affecting Greater Anglia's line as the train service's performance dropped to an all-time-low.