Dorothea Glenys Thornton, Baroness Thornton (born 16 October 1952), known as Glenys Thornton, is a Labour and Co-operative member of the House of Lords. She was previously Parliamentary Under-Secretary for Health.
Thorton was raised in Bradford, and graduated from the London School of Economics. She was Political Secretary of the Royal Arsenal Co-operative Society from 1981, joining the public affairs team of the Co-operative Wholesale Society upon their merger in 1985 and working there until 1992. She was General Secretary of the Fabian Society from 1993 to 1996.
On 23 July 1998 Thorton was created a Life peer by Tony Blair, with the title Baroness Thornton of Manningham. She chaired the Social Enterprise Coalition until January 2008, when she was appointed a junior minister of the House of Lords. In September 2007, she was made chair of the advisory group that trains public sector staff to work with the voluntary sector. In May 2012, her role in Labour was moved from health to equalities, with her role on the health portfolio being taken over by Lord Hunt.
Thornton lives in Gospel Oak, North London, and is married to internet safety expert John Carr. They have two adult children.
She was reported to be claiming £22,000 a year in expenses by saying that her mother's bungalow in Yorkshire is her main home, amounting to around £130,000 since 2002. She was later cleared of any wrongdoing by Michael Pownall, the Clerk of Parliaments, after it was determined that she spent much of her time there while caring for her mother.