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One Plus One Marriage and Partnership Research

Registered charity 1087994, on the register since 13 August 2001. The 8,751st largest charity in England and Wales by income.

What it says it does

One Plus One puts research into practice. We investigate what makes relationships work or fall apart and make the findings accessible through publications, web services, training and resources, to everyone interested in strengthening and supporting couple and family relationships.

In the charity's own words, as filed with the Charity Commission.

Its causes

Education/training

Where it works

It names no single council area: it works across England and Wales, or further.

Check it yourself

Its entry on the Charity Commission register · its own website

Figures are the latest the charity has reported to the Charity Commission, current to 27 September 2026. How this site works.