Network Rail have confirmed that 1,000m of cable has been stolen from the line between Bedford and Bletchley.
A spokesman told ITV Anglia that rail delays would continue for the rest of the day while engineers worked to make repairs.
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It will be a fine and bright start to the day but it will turn cloudy from the west with outbreaks of rain arriving during the afternoon.
The Children's Laureate Chris Riddell visits Rockland All Saints Community Primary near Attleborough in Norfolk.
Business leaders across our region are calling for reassurance following Brexit. Concern is growing at losing EU money.