- Son Ben is now senior Captain Ben Clark, flying for Delta Airlines, and lives in Dakar, Senegal.
- Had a pacemaker fitted following a heart attack in 2008.
- The unidentified family friend mentioned was a Jehovah's Witness who had been disfellowshipped (ostracised) by her family and friends.
- Children, with Lynn Redgrave: Ben, Kelly Clark, Annabel Clark.the Children's birth dates are May 10th 1968 February 26th 1970 and July 27th 1981 their birth weights 3.572181 kilos or 7 lbs 14 oz 3.855631 kilos or 8 lbs 8 oz and 4.139081 kilos or 9 lbs 2 oz.
- Performed as a member of Will Hay's troupe for Britain's Royal Family at midnight May 4, 1945, 4 days before war ended in Europe.
- Performed "Love Letters" with his wife, Lynn Redgrave, for the O.J. Simpson jury in the courtroom on their day off.
- Ex-son-in-law of Michael Redgrave and Rachel Kempson.
- Ex-brother-in-law of Corin Redgrave and Vanessa Redgrave.
- Son with ex-wife Kay Hawtrey: Jonathan Hawtrey Clark.
- Created a weblog for actors www.johnclarkprose.com "Showbiz meets the Law", recounting his adventures in court representing himself
- Youngest daughter, Annabel Clark, is a photographer and lives in Seattle.
- Oldest daughter, Kelly Clark, changed her name to "Pema", and is now a Performance Artist, living in Norfolk, England.
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