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I simular to john here. dont go ugly trying to cater for social media. Is you industry one that is going to benifit from social media would be my first question. Then if you decide it is, I would not have any link that is goiong to take users away from your page. A simple like button, OK

Thank you James and Alan, for the quick response.

I don't believe that would work as the results pages display different content. I think I've got my head round this and its quite simple really, mainly an error on my judgement. We've chosen to no index the dynamically created pages, but leave the follow on so that the actual jobs still get some juice and display in Googles index. I made the mistake of assuming that by no indexing the search results this would also block the googlebot from finding the actual individual job pages.

Perfect. thanks Dan! I know that I asked quite an open question that is likely a frustrating one to experienced SEO professional. But that kind of structure in your response really helps me to organise what in my head is a chaotic task :).