The UK Office of Road and Rail released its annual safety report last month.
Signals passed at danger was 247. The number of signals passed at danger has remained thereabouts 250-300 for the last nine years.
The relative risk is measured based on distance exposure. It is referenced at September 2006 – this is “100%”. Again over the past nine years there’s little obvious trend outside the 40-60% range. The latest figure is one of the lowest, but it also looked that way in 2011.
Source: Marked up chart from: Office of Rail and Road, UK 2017, “ORR’s Annual Health and Safety Report of Performance on British Railways: 2016-17, July 2017, p. 41.