There's a quite interesting article cum exhibition advert on the man in today's Observer. The online version is here. Interestingly enough, there was also one in this weeks i on Thursday, I think. Couldn't find that one on line, but there is an older one, with the same title, on the Independent web-site. Which is odd as they are now supposedly totally independent(!) entities. Both/all three articles seem to me to be rather rehabillitatory, if you see what I mean. I don't know enough about his work to know how low his stock was in recent years.