From the 2000ad message boards:
We have just been informed by Pat Mills that John Hicklenton has sadly passed away.
Here are a few words from Pat: John Hicklenton passed away peacefully last week. His ending was an expected one and he saw it as a triumph over his illness MS. Amongst his final words to me were "MS - you have a week to live, you've met someone you shouldn't have f***** with". A great artist and a true hero.
I met John a couple of times - we had the same agent - and he was always very nice...a little weird, perhaps...but who of us isn't?!! Pat, my agent, would tell me stories of his original art...created on whatever he could find or cobble together ( deconstructed cereal boxes being most prominent in my mind). He was a true original and the spontaneity in his artwork was truly inspirational and unmatchable. Goodbye, John.