Actually I think an even better solution for me is to have rel="canonical" on the articles container template
[[*template:eq=`6`:then=`<link rel="canonical" href="
http://onsitenow.co.uk/blog/">`]]
Because in my blog summaries I use the Summary (introtext) field rather than a snippet of article content + elipsis
So on my list of posts page the content is unique, there is no duplication of text with the articles themselves (though I do use the intro text in the meta description of the article, but I don't think this will count as duplication) So I think having this page indexed is quite good because it's got unique content that's changing regularly, has relevant keywords and links to the appropriate articles.