<P> Hamilton first came to notice while performing at the Edinburgh Festival Fringe in the 1970s . In the mid-1970s he sustained himself by taking jobs at Harrods and the Post Office before joining the BBC in 1976 . </P> <P> His early radio work, mostly on BBC Radio 4 included Week Ending, The News Huddlines and The Million Pound Radio Show (with Nick Revell). He has since appeared regularly in Chelmsford 123, Have I Got News for You, The News Quiz, QI, and If I Ruled the World . Hamilton is frequently invited as a panellist on The News Quiz and as a guest panellist on I'm Sorry I Haven't a Clue . </P> <P> He is the voice of Dr Elephant, the dentist in the children's show Peppa Pig . He was also the original voice of Bob Fish, who is also a dentist, in the cartoon Bob and Margaret . Hamilton is also voice of Captain Squid, the pirate in the children's show Ben & Holly's Little Kingdom . </P> <P> On 16 March 2007, he co-presented BBC Radio 4's Woman's Hour programme alongside usual presenter Martha Kearney as part of that day's Comic Relief fundraising activities, after defeating Richard Hammond and Kelvin MacKenzie in a poll . </P>

Who does the voice of mr elephant in peppa pig
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