The 10 were exchanged in Vienna for three former KGB officers and Sutyagin, all serving prison sentences in Russia for passing sensitive information to the West.
Either Renston's schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.
Social issues were less sensitive: immigrants were not blamed for crime as they were in Germany, say, and Britons were not especially likely to complain about cultural clashes.
They are more likely to press their lips when asked a sensitive question and are more likely to play with their hair or engage in other “grooming” behaviors.