You hijacked a thread that you have not posted on before, you asked for generic links, no mention of U value required, thickness required, description of the existing wall construction, whether you are bonding or screw fixing, whether a new build extension or refurb etc etc.
As you say, any monkey can simply ask for some links, really though, whats the point in answering when you've not given anyone a clue as to why you require the boards, it takes an element of common sense to put together a meaningful request which yours most definitely was not. The more in depth your question, the more in depth the response shall be. You clearly have very little knowledge of the subject in question, that much is obvious from your most recent post.
The links I gave you are links to the 3 of the leading manufacturers of insulated plasterboard, it is your choice as to whether you trust them or not, I couldn't care less.
Still, I bow to the wave of other regulars jumping up and down to answer your original extremely generic question.