Well, BBC Four has finally put up a website for Cordon:
Unfortunately, there is nothing more. The iPlayer link for the Cordon Trailer only says it will be available soon.
As is typical for good European/non-English language material, or at least programmes that are popular, is that the US media comes up with a remake (e.g. The Killing/Forbrydelsen, Broen/Bron/The Bridge, etc.). The US remake occurs in Atlanta, GA.
Not sure how that will work out.