This article was written by Lee Holland who is the tunnel manager and works for the Highways Agency who have responsibility for it on behalf of the Westminster Dept. for Transport. The article is in the Welsh Railway Research Circle's archive, Vol. 3 p. 142 of 6th. Nov. 2002. (www.wrrc.org.uk). Lee has access to much of the historic documentation about the tunnel held by the Highways Agency.
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