Well-known for his work on the metaphysics of persons and the nature of perception, among other topics, Professor Snowdon was at the time of his death Emeritus Grote Professor of Philosophy of Mind and Logic at University College London. Prior to moving to UCL in 2001, he taught for several decades at Oxford University. There is a brief Oxford notice here. I will add links to memorial notices when they appear. Remembrances from those who knew Professor Snowdon are welcome in the comments.
(Thanks to Chris Timpson for the pointer.)
UPDATE: The UCL memorial notice is here.