There is one link to an external web site in this post
http://www.cottagesmallholder.com/?p=1063
It's about half way down the page "The Old Farmhouse". The URL is http://www.cheveleybandb.co.uk
The HTML generated appears to be correct but the link that is presented has the blog URL concatenated, like so:
http://www.cottagesmallholder.com/www.cheveleybandb.co.uk
I recently added a .htaccess file for canonical domain naming (301 redirect) and I wonder if this is coded incorrectly:
Options +FollowSymLinks
RewriteEngine on
RewriteCond %{HTTP_HOST} ^cottagesmallholder.com [NC]
RewriteRule ^(.*)$ http://www.cottagesmallholder.com/$1 [L,R=301]