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Photograph of Keir Mather

Keir has 1 declared interest across 1 category on the Register of Members' Interests. All MPs are required to register certain financial and non-financial interests.

Registered interests

Interests registered across 1 categories. Data from the UK Parliament Register of Members' Interests.

2. (b) Any other support not included in Category 2(a) (1)

Name of donor: Unison Address of donor: 130 Euston Road, London NW1 2AY Amount of donation or nature and value if donation in kind: £2,000 leaflet and direct mail for constituency campaigning Date received: 24 December 2025 Date accepted: 24 December 2025 Donor status: trade union (Registered 5 January 2026)

Interests source UK Parliament Members API