NewsUKHome NewsVideo: Potters Bar crash 'could happen again'Friday 13 May 2011 14:00 BSTCommentsIan Prosser from the Office for Rail Regulation says safety has improved but he would never rule out another major railway disaster.More aboutHertfordshirePotters BarRailroad TrafficRailwayJoin our commenting forumJoin thought-provoking conversations, follow other Independent readers and see their repliesComments
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