In the last interview, Axl and Slash did together in the 90's, they were promoting Spaghetti incident. A guy from England asked him about cover a Queen song.
Axl talked about Brian and Slash jamming together, and then he said it would be a good choice cover Dead on Time. link
I heard Slash on the radio in the UK years ago talking about music that influenced him when he was growing up and he chose More of That Jazz. The first and last time I have ever heard it on the radio.
Weirdly a mate of mine was listening to MOTJ at one of our can clubs and he said 'waiting! play that bit again!' and made me listen to a GNR song and was convinced it was a direct lift. Can't remember which song because of aforementioned cans.