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If all the links are from 200 different domains i would skip the step of contacting the webmasters and go straight to the disavow, its often very time consuming and i would suggest that time could be better spent elsewhere. I swear by this guide for a disavow http://moz.com/blog/guide-to-googles-disavow-tool Good luck

Thanks for the response and whilst it is very useful, it doesn't actually answer my question. We know we want to change the brand, the question is more about how much change should you make in one go. The scenarios are: redesigned site - this is a consolidation of pages, structure change, and a move to a wordpress platform. A pretty major shake up then there's the rebrand and url change My question is, should we do 1 and 2 at the same time in one huge change, or is it more sensible to do 1 first and then after x months, implement change 2. Does that help clarify things?