Career
Lady Mallalieu comes from a distinguished political family. Her father, Joseph Percival William Mallalieu (known as William), was Labour Member of Parliament for Huddersfield East. She was educated at Newnham College, Cambridge, where she was the first female president of the Cambridge Union Society.
Mallalieu fought Hitchin at both the February and October 1974 elections, but was defeated by the Conservative Ian Stewart on both occasions.
House of Lords
On 19 June 1991, Mallalieu was made a life peer as Baroness Mallalieu, of Studdridge in the County of Buckinghamshire. They have two adult daughters.
In 2004, she led the House of Lords opposition to the House of Commons" proposal to ban hunting with hounds.