google.co.uk is an official domain owned by Google. Of course, they're the best out there. Safe site and trusted sources for me. Be aware of the ad results. I wish there were better ways to contact the customer support/help/feedback team.
Google is the best Internet tool of the modern era. It can sift through a wide variety of services (News, Shopping, etc) incredibly quickly, giving you comprehensive results. This is probably my most trusted site on the web