They performed together at Knebworth in the 1990s. It was the one where Pink Floyd closed the show. I'm not sure whether they played Sultans. The only track on the tv highlights was Solid Rock.
Didn't they come together at the concert to free Nelson Mandela?Clapton took a back seat for the most part, I can 't remember the set (although i believe they did Money For Nothing, and later Wonderful Tonight).