I have just found this on the British Rally Forum.
"It is with great sadness that I have to report the death of Warren Chmura in Morocco tonight, whilst competing on the London Casablanca Rally.
Information is sketchy but it appears their infamous pink Citroen DS left the road after a possible heart attack. No other vehicles were involved. Warren's wife, Jean, was navigating and initial reports are that she is not seriously injured.
The organisers will issue a statement later on tomorrow (Friday) when they have a fuller picture of what actually happened.
I'm sure all our historic competitors, organisers and marshals will be as stunned as I am by this news.