could be HIV-related..
he almost died from pneumonia 5yrs ago, which shouldnt really happen with a relatively fit, athletic bloke in his 40s... would maybe indicate a depleted (and depleting) immune-system..
knowing that treatments were now showing diminishing returns, he may have got very depressed at the ensuing inevitability of his demise and how it would affect his artistic-legacy.... may also explain his fall from a moving vehicle on a motorway..
the words '' he died peacefully at home' would perhaps indicate that his family knew of his illness worsening, and that maybe he was on his deathbed.... obviously didnt want to publicise it beforehand
still... a true icon of recent times of the British cultural scene.