The Grayrigg derailment in 2007, resulting in the tragic death of Mrs Masson, was a terrible event.
Within hours of the event it was clear that we were responsible, that the infrastructure was at fault, so it is right that we plead guilty.
We again apologise to Mrs Masson's family for the undoubted grief this has caused them.
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Pictures from the commemoration marking the centenary of the Quintinshill rail disaster, which killed more than 200 people, is underway.
The 100th anniversary of Britain's worst rail disaster will be commemorated at a special service today.