Graham N. Flack was born in 1954 (date suppressed) in Richmond, Surrey.

Graham married Rosalind Jeanne Marianne Phillips on Saturday 27 August 1977 in Reading, Berkshire.

He had the following children from his marriage to Rosalind Jeanne Marianne Phillips:

- Ian James Flack	born in 1978 (date suppressed) at Reading, Berkshire.
- Thomas Andrew Flack	born in 1980 (date suppressed).

Details of Graham's occupation are not known.