Lesley was a Bane disguised as a human woman, who served as the PA and secretary to Mrs Wormwood at the Bubble Shock! factory.
On Wormwood's orders, Lesley tried to kill Sarah Jane Smith in a lift. She was unsuccessful, and Sarah Jane subsequently escaped. Injured, Lesley went back to Mrs Wormwood and told her that Sarah Jane escaped, much to Wormwood's displeasure. (TV: Invasion of the Bane)
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