Thanks to all. I will buy a one way ticket from Mexico to London for some point in Feb.

I have actually just started a business based in the UK. At the moment I am only doing the marketing and building the website and I don't expect to start trading until Feb. I would be going back to the UK in early 2012 to do all the paperwork (registering it for tax and opening a business account). I guess that creates another credible tie to the UK. I will only bring that out if things get really bad though.

Thanks again!