Air Marshal Sir Harold John Maguire , KCB , DSO , OBE , ( 12 April 1912 -- 1 February 2001 ) was Director - General of Intelligence at the Ministry of Defence from 1968 to 1972 .
Air Marshal Sir Harold John Maguire , ( 12 April 1912 -- 1 February 2001 ) was a senior Royal Air Force officer and public servant . 
 He was Director - General of Intelligence at the Ministry of Defence from 1968 to 1972 .