http://www.bbc.co.uk/comedy/guide/talent/v/vosburgh_dick.shtml has a linked list of programmes he worked on, though not samples per se I don't think.

From the obit in The Times today, he came to the UK in the late 40s to go to drama college (RADA) and just stayed, essentially.
http://www.timesonline.co.uk/tol/comment/obituaries/article1700940.ece