If you search taginfo for a name of anything in OSM you'll be able to find it, so from https://taginfo.openstreetmap.org/search?q=Starley+Regional+Cycle+Network#values you can click through to https://taginfo.openstreetmap.org/tags/description=Starley%20(TfWM)%20Regional%20Cycle%20Network%20(Proposed%20route) and from there there is an overpass turbo link to https://overpass-turbo.eu/s/2dMV and if you click on that you get to https://www.openstreetmap.org/relation/17077005#map=11/52.5080/-1.8073 .  As clear as mud :)