But Chadwick's origins 20 miles away never indicated what he would later achieve. "He was not from any kind of wealthy background," says Dr James Sumner, a historian of technology at the ...

Image caption, James Chadwick died at the age of 82 Chadwick believed British participation was "helpful", even though "perhaps we had not many contributions to make".

James Chadwick's school in Cheshire now has a blue plaque in tribute to him. Before his tenure at Los Alamos, Chadwick's career had developed in Manchester, ...