petehall - 8:16 pm on Jul 9, 2012 (gmt 0)
.co.uk domain, geo,location meta tags, and localised to uk traffic in google webmaster. Is that what you meant?
Look to the left side of the screen on your search results - your location will be displayed. I have had this default to different locations at work/home and the location DOES affect some organic SERPs.
Not all of them of course... but it does affect some.