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Hi Nikki, This worked perfectly! Thanks for the reply, it's greatly appreciated!

I've only had a quick look, but here is my theory. If you noticed a sharp drop in Google in October of 2013 then there's a good chance that the Penguin 2.1 update on October 4 affected the site.  I do certainly see links that the Penguin algorithm would look upon unfavorably.  For example: http://www.westdigitalmarketing.com/blog/funding-solutions-uk-digital-strategy/ http://www.startupoverseas.com/news/invoice-finance-for-an-exporter--cash-flow-and-peace-of-mind.html http://21stguru.com/index.php?s=A&c=39&p=141 But, as Penguin was only a Google thing, it wouldn't affect your rankings in Bing and Yahoo.  Those unnatural links were probably supporting your rankings in those search engines. So, when you removed bad backlinks in order to clean up for Google's sake, you removed links that were supporting you in Bing and Yahoo and thus those rankings dropped. There could be other reasons too, but that's my theory.