A signalling fault between Letchworth and Royston is affecting services between the stations.
Services are subject to delay, cancellation and alteration while technicians arrive on site to investigate.
Disruption is expected until around 6.30pm.
A signalling fault between Letchworth and Royston is affecting services between the stations.
Services are subject to delay, cancellation and alteration while technicians arrive on site to investigate.
Disruption is expected until around 6.30pm.
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