A line between Sandy and Biggleswade is closed because of a broken down freight train – causing delays to London-bound services this morning.
Govia Thameslink is advising its Great Northern customers that services running through these stations may be cancelled or delayed by up to 15 minutes.
Trains at Biggleswade which normally use platform one will now use platform two.
The disruption is expected to last until 12pm.
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