It seems he is still working, given this link where he was part of a 2008 "live" art festival.

And not sure when it was written, but according to this fellow,
Chisnall now lives in France.

"I was inspired by a good and close friend and very famous writer , Poet ,Artist ,Golden Globe and Golden Apple winner . Along with countless other awards , " Edward Chisnall " . He encouraged me to start writing . You can check him out on the Internet . He may come under "The Bell In The Tree" or "The Time Traveller". A truly remarkable man , He is living in France now and I miss him and Margaret ." [all punctuation sic!]