The source is https://osm.mathmos.net/defib/progress/LA/#17/54.04879/-2.80997, which shows data from the ambulance service. The license is incompatible, so it can only be used to inform surveys, rather than being copied directly into OSM.

Note that it’s incorrectly being shown as matched to the defib at the train station. Click on the green line and it’ll give you more information from the ambulance service, saying that there’s a defib called CPAD1641 in Westfield Village.

Maybe it’s inside and only accessible to residents/staff. I guess this note can be closed without any changes to the map then. Thanks for taking a look!