The pay is what gives it away in part. Also in the Uk they "speak" English, why advertise on an international board like this one when you have a whole country of people who speak the tongue you want your family to learn?

My guess is that if you go far enough in the negotiations you will have to send some kind of processing fee, application for, or something like that for a visa or something, no doubt they will try and make it sound very reasonable. These scam artists might actually get away with this kind of thing if they stopped offering such huge salaries. I suppose they think some people out there are so dumb they won't get the "too good to be true angle", and I guess some are.