Running a search on the .com address (site:www.sitename.com product) Google returns the .co.uk address in all its results. If the .com address wasn't in their database it wouldn't return anything, would it?
Both have link popularity, the .com address seems to have the highest.
Any ideas?....
for me it seems, that google realizes that the .com and the .co.uk page are the same. so google displays only the links to one of the pages. so co.uk is more speaking then only .com which is related to commercial in generell, and co.uk to commercial in the uk.
link popularity is only to where other sites link to, so your .com site is linked more often then the .co.uk site.
i won't think that this is a real problem for you, it looks quite like a cosmetic issue, isn't it?
Also does this imply that there has been a manual check on the site to ensure that they are the same page? Otherwise surely it is a big assumption to make?
It is partly a cosmetic problem for us, although we have a number of other domains including a www.site-name.co.uk (again pointing to the same content). The www.site-name.co.uk address is being spidered fairly regularly, however it is the www.sitename.co.uk that appears highest in the rankings, even though it hasn't been spidered in a number of months.
It is proving confusing as people think that they are different sites. I also think that we are losing out because of the different results, each with different page ranks.
i don't know if they have to do the merge manually, a site i know which is .de and .net, only .net is displayed now. some other guy wrote today, (i think it was even co.uk and com, too), that both sites are listed (not merged).
maybe google needs a bit to analyze and corrects it then. or if it's on the same server (ip-address), that might be an indicator for google. i'm sure google will look for ip-adresses.
to get out of this, take sitename.co.uk as your default or main domain name and let the other domain names do a 301 (permanently moved) redirect to sitename.co.uk .
(you can take another domain as 'main', too, this is more an example)