48.—(1) Any of the following incidents which, taking into account the circumstances, might have been liable to cause the death of, or major injury to, any person—
(a)failure of—
(i)a locomotive;
(ii)a railway vehicle; or
(iii)a rope haulage system used in working an inclined railway; or any part thereof;
(b)failure of a structure or part of the permanent way or formation, including any tunnel or cutting; or
(c)any train or railway vehicle striking an obstruction on the line.
(2) Any case of collision, derailment, or a train unintentionally becoming divided, except one occurring on a siding or during shunting operations when there were no passengers on the train or other vehicles involved.
(3) Failure of the equipment of any level crossing or a train running onto a level crossing when not authorised to do so.