Complex sentence: She did voice work on "Alias the Jester" and "The BFG" where she voiced Mrs. Clonkers (with David Jason voicing the BFG) for Cosgrove Hall.
Split into simpler sentences: She did voice work on "Alias the Jester" and "The BFG". She voiced Mrs. Clonkers (with David Jason voicing the BFG) for Cosgrove Hall.