mark_roach - 5:55 pm on Sep 24, 2011 (gmt 0)
I have always hosted my 12 year old .co.uk site in the US mainly due to the cost. The same server with the same company would cost me twice as much if it were hosted in the UK.
I have a mainly UK audience and I rank far better in google.co.uk than google.com.
I am sure that if I hosted in the UK it wouldn't make my rankings any worse, but just how much difference might it make for a well established site ?
I can see how it might make a big difference for a new site but I am fairly certain Google knows all about my site and my target audience by now.
I am tempted to swap to UK hosting but it will be a pretty expensive experiment if it makes no difference.