Here's something made possible by the web: a transcript of one of Oakeshott's BBC lectures - on the philosophy of history, with an audio of the great man reading it on the radio. Leslie Marsh, who posted it, writes:
Not having met MO, I find reconciling the voice with the image of the man difficult. I am told that the voice remained pretty much the same in his later years.
It lost a little of its post-war twang, I think.