River Thames Society

Analysis

River Thames Society is a registered charity in England and Wales, based in Windsor. It was registered in January 1984, 42 years ago. Its declared purposes cover environment/conservation/heritage and recreation, which this site groups under environment and conservation. Legally it is a charitable company (Companies House number 01747301). It says it provides human resources, provides services and provides advocacy/advice/information.

In the financial year ending October 2025, River Thames Society reported income of £49k and spending of £56k, spending 115% of what it took in. Across the 5 years on record, from October 2021 to October 2025, income fell from £50k to £49k (-2.3%), an average of -0.6% a year. The sharpest change came in the year to October 2023, when income rose by 62%. Over the whole period it spent 93% of the income it received.

Among 4,574 England and Wales charities whose main cause is environment and conservation and that reported income, River Thames Society sits at the 70th percentile: it is larger than about 70% of them. Against every charity in England and Wales with reported income it ranks in the 60th percentile. Charities of a similar size with the same main cause include Oxfordshire Family History Society (£49k), Round Tower Churches Society (£49k) and Foxcote Manor Society (£49k).