I'm not sure about other search engines as I tend to use Google for most of my searches. Instead of going to the US google site (http://www.google.com) I always use the UK version (http://www.google.co.uk). The underneath where you type for what you're looking for click on "pages from the UK" and then click the search button.
I think for other search engines you can do the same thing but these options may be under an advance search setting