squadron leader drew wilson cpl phil saunders - orderly cpl stan archer ; 1st rifles - patient others alan jarvis mi5 ( ex-head of section 11 ) richard evans mi5 prof jack barclay/aka dr. roger lloyd - cern professor williams director , cullum nuclear research laboratory *** about the author duncan james was an raf pilot before eventually reaching the higher levels of the british civil service , in a career that included top-level posts at home and abroad with the defence ministry , and work with the metropolitan police at scotland yard .