Yes such Sad news, I've also had the privilage of meeting him many times, as someone else has already said he was a True character in the world of light aviation, someone who always had an appropriate story or comment to make regarding anything aviation related, which was usually gaurenteed to end in a burst of laughter.
I send my deepest condolences to all his family & friends and just hope that his Son James can continue the families involvement in aviation and of course Crossland Moor
RIP David