Just to reiterate, this isn't a decision you can take lightly and it is both xpensive and full of potential pitfalls. You should certainly study the various forums that are available to discuss these topics (
www.britishexpats.com/forum is another in case it hasn't already been mentioned) and, if you do decide to go ahead with it, you definitely need good legal counsel to handle the immigration application. If and when you do decide to pursue this, pm me for a legal firm we use regularly in matters like this.