What key details about david leigh -lrb- journalist -rrb- can be extracted from the following bio? Bio: david leigh -lrb- born 1946 -rrb- is a british journalist and author who was the investigations executive editor of '' the guardian '' . he retired in april 2013 , although leigh anticipates continuing his association with the newspaper .
A:
- title is the guardian 's former investigations executive editor- years active is 1970 -- present- education is nottingham high school , king 's college , cambridge- birth date is 1946- name is david leigh- nationality is british- occupation is investigative journalist , assistant editor