EDITED : The short answer is no, but read on to discover how this was tested.
What's the all the fuss with NOFOLLOW?
When someone makes a comment on one of your posts they can include a URL. Perhaps to their own site or blog for example. A search engine crawling your site would then follow the url and index that content.
On blog that ranks well within the search engines, this would encourage spammers to post comments just so they can get their content indexed.
There is a NOFOLLOW attribute that can be included in html that would stop a search engine from following the link.
In an effort to beat spammers, many blog platforms have NOFOLLOW automatically included in their templates. Which is great for fighting spam, but not so great for genuine commentators to my blogs.
I personally have no problem with passing on a little link love by allowing links to be followed by serach engines. So I don't want the NOFOLLOW attribute screwing with my commentators.
So, does blog.co.uk have the NOFOLLOW attribute in use by default?
There's only one way to find out. Once I've published this, I'll comment on it and check the source code of the page.