The tool I've developed at https://osm.mathmos.net/defib/progress to compare the Circuit data with that in OSM, is possibly outside the terms of use for the Circuit Data at https://www.bhf.org.uk/defibdata , so I've checked explicitly with the people from The Circuit that they're ok with me doing it. I also got specific permission for OSM editors to add the Circuit UUIDs to OSM. (Unless data is already licenced under an OSM-compatiable licence such permission would be needed to add any third-party data to OSM because of copyright/database rights.)

The permission I've got covers any OSM mappers adding the UUIDs to OSM, either by using my tool or downloading the data themselves.