Server location regarding libel laws

Curious if anyone knows the background case law on server location for UK libel. (or jump in if you know about other countries)

I was reading an article on TechCrunch  http://techcrunch.com/2013/02/05/lulu-raises-another-2-5m-from-yuri-milnerangels-for-its-girls-only-app-to-rate-guys/  about a startup called LuluVise

Which lead to this article http://techcrunch.com/2011/12/13/luluvise-goes-live-but-will-this-girl-only-site-attract-more-legal-ire-from-the-guys/    

 

My question is if the servers aren't located in the UK....then does it matter?  To be honest I’m surprised there aren't more comments on this legal dilemma.
 
Anyone here familiar with precedents? Btw it looks like DirtyPhoneBook from 2010 is still online http://blog.collins.net.pr/2010/03/wwwdirtyphonebookcom.html



Cheers,
Dean