Facts:   - years active: 1952 & ndash ; present      - birth date: 1924 or 1925    - television: '' 70s -rrb- '' thunderbirds '' -lrb- 1960s -rrb- '' thunderbirds doctor are go '' -lrb- 2015 - -rrb- who '' -lrb- 1960s & ndash ;    - name: david graham    - nationality: british    - birth place: london , united kingdom    - occupation: film , television and voice actor   Based on these bullet points, write a short biography describing the life of david graham -lrb- actor -rrb- .
The answer to this question is:
david graham -lrb- born 1924/25 -rrb- is an english character actor and voice artist .born in london , he trained as an actor in new york city following service in the royal air force as a radar mechanic , and has since worked mainly in british television .graham is known for his voice work for the series `` doctor who '' and `` thunderbirds '' during the 1960s .