First, can I ask if you received any message from Google in Webmaster tools? I'm wondering whether you got an unnatural links warning.
At first glance, I think you may have received a Penguin/Over-optimisation penalty. Looking at the anchor text diversity in your link profile (http://www.opensiteexplorer.org/anchors?site=www.tilers-dublin.com) and (http://www.opensiteexplorer.org/anchors?site=www.painterdublin.com) the vast majority of your links come from anchor text heavy terms, like "painting dublin" and "tilers dublin".
Furthermore, it looks as though the majority of these links are coming from the footer from your group of websites and are site-wide. After the Penguin update, this quickly became a big red flag.
My recommendations would be first to check what message you've received from Google. After that, I would remove all of the footer links on your sites. I think you would be OK replacing these with a single link, on the homepage, to your websites - provided that you mark it as "nofollow".
Once that is done, I would file a reconsideration request. I haven't checked many of your other backlinks, so it might be the case that you would need to remove any other spammy links you can find there.