So have installed and used the plug-in and switched to pretty permalinks to look at one of the problematic pages. http://www.cudddlesandpuddles.co.uk/blog/
Output below.
I can't make out though what it is telling me. I think it is saying that it has 1 match for the first "product" rewrite rule ... which I can't understand. Or indeed what to do about it.
Rule Rewrite Source
(.+?)/?$ index.php?product_cat=$matches[1] product
(.?.+?)(/[0-9]+)?/?$ index.php?pagename=$matches[1]&page=$matches[2] page
([^/]+)(/[0-9]+)?/?$ index.php?name=$matches[1]&page=$matches[2] post
Any help decoding the output and further suggestions gratefully received
Thanks