when did mary berry leave bake off

Mary Berry left The Great British Bake Off in 2016, at the point when the show moved from the BBC to Channel 4. She announced her departure on September 22, 2016, citing her decision to stay loyal to the BBC, which had nurtured her and the show from the beginning. She chose not to follow the show to Channel 4, contrasting with Paul Hollywood, who decided to remain on the show after the move.