Frank Barnaby obituary

Radiation physicist at Aldermaston who went on to warn of the dangers posed by the civil and military uses of nuclear energy

The nuclear weapons scientist Frank Barnaby, who has died aged 92, became one of the most effective critics of the international arms race. As the cold war superpowers competed with ever more advanced weaponry to wage a war that could never be won, Barnaby helped amass an arsenal of reliable information and informed argument to keep an anxious public aware of the deadly devices being developed supposedly to keep the world safe.

By the close of the cold war and the beginning of the collapse of the Soviet Union in 1989 he and others had assembled an informal international bureaucracy of peace and provided the intellectual ammunition to persuade politicians, military and public to accept a dramatic reduction in the nuclear weaponry.