Ken Scott - well said. The certification process for CEA now clearly requires your career manager/desk officer etc to state "it is likely" you will move in the next 4 years. In that case, CEA seems a sensible insurance policy for your children's education, especially where GCSEs/A Levels are involved.
I am also rather surprised at the vehemence of many of the arguments against CEA in this thread. It is open to everyone but not something everyone would choose to do. Undoubtedly there are those that may have played the system over the years, but tighter regulation is about to put a stop to that. As for those of us who legitimately claim and move when required, please stop trying to paint us as some sort of benefit junkies. After over 20 years at sea, I for one would quite like to see my wife every night and give my kids the best possible shout at good exam results through guaranteed educational stability.