Susan Cunliffe-Lister, Baroness Masham of Ilton
Susan Cunliffe-Lister, Dowager Countess of Swinton, Baroness Masham of Ilton,  (née Sinclair; 14 April 1935 – 12 March 2023) was a British crossbench member of the House of Lords. She was a member of the House of Lords since 1970. She was the senior female life peer.