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yes...the wordpress plugin I used took care of that....

I'm not sure what the advantage of making the tag pages into pages is. I guess I could hide the tag part of the url...so www.businessinteriors.co.uk/tag/office-design-birmingham becomes www.businessinteriors.co.uk/office-design-birmingham The tag set up of wordpress lets me set up individual "pages" for hundreds of keywords,a albeit not easily customised. Does a "page" look different to google? And treated differently? I settled on a tag structure for targeting my keywords, rather than targeted pages with posts being pulled in by tag, because it is not easy to show posts from a tag in the content area of a page without getting down and dirty with code. I found a plugin (associated posts) but the developer wanted to charge me...the posts looked rubbish on the page...and the last straw was another charge for the "upgrade"! I assumed the tag structure was only so much a disadvantage to me because they are harder to play with than pages. (I got round this by using a little plug in that pulls the tag header and description into the tag page as unique content). If you think a tag page is "recognised" by google and treated as some low level library...than maybe I ned to re-think  :-s

Use the most relevant page for each keyword. If you want to target any keyword make a page or tweak a page that is its closest match (that is if the page is not being ranked for anything else. people make the mistake these days of trying to rank too many keywords for a single page. Think about it the pages you create should be designed and posted around the user, each page Title, Description, H1 should be different, from the 4 pages i looked at on your site you are targeting the same keyword on 3 of the 4 different pages your kind of self cannibalising those keywords, Google is a little unsure what is the page it should be ranking for. Plus the Birmingham page has very little text, and its out ranking the home page add around 200 words to that page targeting that keyword and you will see a big improvement Good Luck

Rand has a useful post with several suggestions for when the "wrong" page ranks at http://www.seomoz.org/blog/wrong-page-ranking-in-the-results-6-common-causes-5-solutions

Hi James, I would try changing everything back to see how that affects your site, if you had some strong links on those archived pages they may have influenced your results. On a side note... I am afraid you may have been affected by Googles Penguin update. A quick glance at your backing profile shows that your site http://www.businessinteriors.co.uk/ has many inbound links however not enough branded links.  To a search engine this looks fabricated rather than natural. A natural profile will have majority of the inbound links branded (diverse) some long tail (diverse) and few [exact] keywords. Also what type of sites are you getting links from? are these sites relevant to your industry? Are you listed on sites with lots of irrelevant links? Google wants you to earn your keep, build valuable information and help their users. If the users like your site you will rank again.