"The track worker had left the down cess, crossed three open lines, and stood
in the middle of an open line. The COSS qualification held by the track worker
also meant he held the individual working alone (IWA) qualification. This allowed
the track worker to carry out work alone when on or near the railway. The track
worker thought that because he was effectively working on his own, he could use
his IWA qualification to cross the railway. However, when working as an IWA,
a safe system of work must still be planned and Rule Book Handbook 7 only
permits an IWA to cross just one open line when working.
...
All workers who go on to Network Rail tracks are required to hold a personal
track safety qualification, which is subject to recertification every two years. Both
the track worker and the COSS held this qualification (which is a prerequisite
to qualifying as a COSS). Personal track safety training covers how to cross
the railway, which is from one safe place to another on the other side, without
stopping, while continually looking out for trains."
https://assets.publishing.service.gov.uk/media/5a82c4bae5274...[...]