Ann Lloyd Keen (née Fox; born 26 November 1948) is a British Labour Party politician, who served as Member of Parliament (MP) for Brentford and Isleworth from 1997, until she was defeated by Conservative candidate Mary Macleod in 2010.

She went to Elfed Secondary Modern School in Buckley, Clwyd, then gained a PGCEA (Postgraduate Certificate in the Education of Adults) from the University of Surrey.

[11] In 1998, Keen proposed an Early Day Motion calling for equitable care for women with ovarian cancer, which was supported by over 100 other MPs.

[12] On 29 June 2007, in Brown's first reshuffle as Prime Minister she was promoted to become a Parliamentary Under Secretary of State in the Department of Health, where her brief included NHS dentistry.

[13] In 2009–2010, Keen led the Prime Minister's independent commission on the future of nursing and midwifery in England, which resulted in the report Front Line Care.

[14] On 28 January 2009, Keen voted against a motion in Parliament calling for a review of the decision to add a third runway at Heathrow Airport.

In defending their part in the expenses scandal the Keens stated "we have advocated, strongly supported, and voted for the introduction of Freedom of Information legislation.

Keen invited them to coffee mornings using prepaid envelopes and on House of Commons headed stationery, a breach of Parliamentary rules as they are only permitted to be used for replies.

Keen was initially ordered to pay £15,000 in damages by a judgment entered in default, but the ruling was later set aside, with the judge stating there was no entitlement in law for him to bring such a claim.