It's possible, but I think it's more likely that the Google account that has made the Three Rings app (https://play.google.com/store/apps/details?id=uk.org.thre

It's possible, but I think it's more likely that the Google account that has made the Three Rings app (https://play.google.com/store/apps/details?id=uk.org.threerings.pwa https://play.google.com/store/apps/details?id=uk.org.threeri...) with a listed phone number (+44 7795...) also claimed ownership of the Three Rings website through whatever domain tools Google offers. In that case, the developer provided Google with a way for Three Rings customers to reach them and they then published that number. I don't know why the app's developers decided to use their personal phone number for their Google Play business contact information, but that seems like the most reasonable explanation to me. If the author did not provide that phone number to Google Play, then he will need to also update his information there to get the phone number delisted, or it will be a matter of time before it appears on the Google Search page again.