I'm not being rude however have you tried the SEARCH function on this site?
Rowlocks...give us all your evidence and proof!
IMHO a .co.uk has a far greater chance of ranking than any other extension in the .co.uk SERPs however those SERPs are way screwed-up with all their tinkerings.
I'm not going to give anyone any clues as to what seems to be happening however I do have my own legitimate testing proof of what they "believe" they are achieving and you would be extremely surprised.
Whomsoever is supposedly in charge of these geo-targetting SERPs really has not a clue of how the real business (whether manufacture/wholesale/retail) world ACTUALLY exists!
I cannot write much more without giving away extremely valuable knowledge...sorry.
[edited by: HuskyPup at 1:49 am (utc) on Aug. 30, 2008]