Following her resignation, Lister did freelance work for BBC News and for South Africa's Capital Radio 604. In December 1984, Lister exposed a document authorising the interception of her mail by South African authorities, causing her to be arrested and detained for a week under the Official Secrets Act.
Following her departure, Lister worked on a freelance basis for BBC News and for South Africa's Capital Radio 604. In December 1984, Lister revealed a document permitting the surveillance of her mail by South African authorities, leading to her arrest and detention for a week under the Official Secrets Act.