You could change the default search over to Google UK.
http://www.macosxhints.com/article.php?story=2009032004345842
[robg adds: Occasional hints editor Kirk McElhearn did some testing with the International System Preferences panel for me on this one -- Safari will use the local version of Google that matches the settings in the Language/Format tabs, as long as you also delete your Google cookies when making the changes. So this hint would mainly be useful to those who wish to have one location set via the International panel, but want to use a different local version of Google.
Update: More than likely, this hint will cause Safari's code signature to fail, resulting in Safari no longer being able to access the Keychain -- see this hint for more details on this problem (in 10.5 only).]