She served in numerous opposition front bench roles in the Lords from 2011 until 2021, when she became Chair of the International Agreements Committee.

Between 2012 and 2021, Hayter discontinuously served as a Shadow Spokesperson for the following departments: She was elected Deputy leader of Labour in the Lords in June 2017.

[6] In July 2019, Jeremy Corbyn sacked her as Shadow Brexit Spokesperson for making what the party called "deeply offensive" remarks at a Labour First meeting.

Hayter asserted that the party's leadership was not open to external views and suggested those around Corbyn were "in a bunker" like the "last days of Hitler".

[7][8] Dianne Hayter lives in Islington, London with her husband, Professor (Anthony) David Caplin, whom she married in 1994.