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Memorandwm Esboniadol
73. The following classes of accident where they are likely to cause an accident to a train or a significant risk of personal injury to any person—U.K.
(a)the failure of a tunnel, bridge, viaduct, culvert, station or other structure or any part of it including the fixed electrical equipment of an electrified relevant transport system;
(b)any failure in the signalling system which could cause a significant risk to the safe passage of trains other than a failure of a traffic light controlling the movement of vehicles on a road;
(c)a slip of a cutting or of an embankment;
(d)flooding of the permanent way;
(e)the striking of a bridge by a vessel or by a road vehicle or its load; or
(f)the failure of any other portion of the permanent way or works.