[anon1385]

>I believe we strip the last two blocks off the IP address before sending it over.

No you don't. You don't "send" anything over to Google. The users browser does because loading a gov.uk page also loads a Google Analytic script straight from google-analytics.com. You don't have the power to prevent the users IP being sent to Google in that situation and it's worrying that you think you do.

Additionally, focusing on the IP address seems rather silly when a much more accurate tracking cookie is being used.