# The Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013, Paragraph 57


The derailment of a non-passenger train—
(a) on a running line, except a derailment during shunting operations which does not obstruct any other running line; or
(b) in a siding, which causes an obstruction to a running line.

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Source: https://www.legislation.gov.uk/uksi/2013/1471/schedule/2/paragraph/57 (the official version)
Page: https://openlegislation.uk/reporting-of-injuries-diseases-and-dangerous-occurrences-regulations-2013/schedule-2/paragraph-57
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.