Unite the Union

Unite the Union — Labour's Largest Union Funder

Full name: Unite the Union Approx total donated (2024-2026): £3-5 million (via affiliation fees, direct donations, and campaign support) Type: Trade union — Labour's largest union affiliate Why they donate: Represents working-class interests across manufacturing, transport, public services, and logistics. Seeks to influence Labour's industrial relations, workers' rights, and nationalisation policy. Controversies: Internal factional battles within Labour have been heavily influenced by Unite. Accusations of "block vote" influence over candidate selection and policy direction. Under previous leader Len McCluskey, Unite was a major force in Labour's leftward shift. Current leadership under Sharon Graham has been more focused on industrial action but remains influential.

Notes

• Around 1.2 million members
• Also funds Labour MPs directly through constituency donations
• Was central to the factional battles of the Corbyn era
• Sharon Graham's leadership has deprioritised internal Labour politics relative to industrial strategy