We have to be honest with you: possibly.
Because of what SCA UK is, being on our list may in itself suggest that you or someone close to you has had a cardiac arrest. For some people that is private, and not something they have shared widely.
Beacon has seen no evidence that any of the information has been published anywhere, and criminals in incidents like this are generally looking for money rather than reading individual records. But we would rather tell you plainly than offer you more reassurance than we can honestly stand behind.