Commuters at Stevenage and Letchworth GC are suffering delays this morning (Image: Archant)
Train delays have been caused by overhead wire problems this morning (Thursday).
Delays of up to 30 minutes are expected between Letchworth GC and London Kings Cross, affecting services at Stevenage.
Technicians discovered problems with the overhead wires at Gordon Hill but this has had a knock-on effect on other lines.
Network Rail apologise for any inconvenience.
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