I didn't intend to misleading intentionally. The data should be safe with Google as long as they choose not to use it for targeted advertising purposes, which is probably pretty unlikely.

Of course, many medical providers in both the US and UK already use cloud based services to store this data - I think the difference though is that usually the companies they use are geared towards medical data, and therefore don't have their hands in ads as they are paid as contractors by the providers.