Details of Colin's birth are not known.

Colin married Sally Bleazard on Saturday 28 January 1978.

He had the following children from his marriage to Sally Bleazard:

- Andrew Colin Marshall	born in 1981 (date suppressed).
- Katie Jane Marshall	born in 1982 (date suppressed).
- Neil James Marshall	born in 1984 (date suppressed).

Details of Colin's occupation are not known.