Mark Critchley is the son of Barnes Critchley and May Deakin.

Mark was born around 1958 in Warrington, Lancashire.

Mark married Kathryn A Eden in 1980 in Warrington, Lancashire.

He had the following children from his marriage to Kathryn A Eden:

- Paul John Critchley	born around 1982.
- Steven Barnes Critchley	born around 1986.

Details of Mark's occupation are not known.