After boundary changes in 1983, Lestor contested the new constituency of Slough but was defeated by the Conservative candidate John Watts. Neil Kinnock, who became leader of the Labour Party shortly after the election said he was "heartbroken" by Lestor's defeat.[1] Lestor blamed the SDP for her defeat.[2] No longer an MP, Lestor worked for the World Development Movement, campaigning for child welfare and setting up a unit to investigate child abuse, including sexual abuse, an area neglected by mainstream politicians at the time.[3]