Lesley was the PA and secretary to Mrs. Wormwood at the Bubble Shock! factory.
Biography
Lesley tried to kill Sarah Jane Smith in a lift, but was unsuccessful and Sarah Jane subsequently escaped. Injured, Lesley went back to Mrs Wormwood and told her that Sarah Jane escaped. It is likely that Lesley was then devoured for her failure. (SJA: Invasion of the Bane)