CAPTCHA
The Wikipedia page on CAPTCHA:
The tempusfugit.me.uk website does not use CAPTCHA. There is no information that has to be verified as submitted by the visitor. Such information would be robot access to forms on the site that attempt to inject malicious data.
When accessing the website using TOR the Google Tracking code seems to pickup the accesses from the TOR network when a page on tempusfugit.me.uk is accessed multiple times by changing the TOR Circuit.
CAPTCHA and TOR - how Google Analytics sees things
Not only does the CAPTCHA screen display when Google detect a suspect robot access to the tracking code the origin of a suscessful access quite oftenly displays as an access from Tehran, Iran!