<Tr> <Th> Occupation </Th> <Td> Actor, voice artist, screenwriter, producer </Td> </Tr> <Tr> <Th> Years active </Th> <Td> 1987--present </Td> </Tr> <P> Simon James Greenall (born January 3, 1958) is an English actor, writer, producer and voice artist, well known for his roles as Michael in the BBC TV series I'm Alan Partridge, as well as in Alan Partridge: Alpha Papa, the Caretaker in the CBBC game show Trapped!, Richard in Lucy Sullivan Is Getting Married and various roles in TV comedies such as Harry Enfield's Television Programme, The Armstrong and Miller Show, Alas Smith and Jones and The Impressions Show with Culshaw and Stephenson . </P> <P> As a voice artist, Greenall is known for voicing Captain Barnacles in Bromwell High, the Twins in the Shaun the Sheep Movie, Captain Barnacles in The Octonauts and Aleksander the meerkat in the comparethemarket.com commercials . </P>

Who does the voice of sergei the meerkat