The black box has been recovered from the wreckage of the Bedford train crash that killed the driver and injured 100 others.
Rail investigators removed it from the Luton Airport Express yesterday and placed an evidence sticker on the side.
The data recorder will help investigators piece together what happened before the service ploughed into the back end of a stationary passenger train at 5.15pm on Friday near Bedford.
The collision killed a train driver instantly and left nine people in a critical condition in hospital.
Of the 100 victims, 11 people were very seriously injured, a further 32 were seriously hurt, and 57 others
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