I hope he had reasonable health for a long time. I believe he was quite ill in the 80s.
Excluding Leeds because I don't want to be objective , played a key part in the best English club side I ever saw. Liverpool was it 79 or 80, they finished the season beating Leeds 3-0.
He broke my 8yo heart in 1971 scoring the goal that clinched Arsenal the title, away at Spurs.