Ouse and Derwent IDB reconstituted to 11 members
From 27 February 2026, the way your local drainage body is run has changed. A government Statutory Instrument has reconstituted the Ouse and Derwent Internal Drainage Board in Yorkshire. We are here to explain what IDBs are, how this Order works, and what to watch next.
According to the Ouse and Derwent Internal Drainage Board (Reconstitution) Order 2026 published on legislation.gov.uk, the Board now has 11 elected members rather than 22. The drainage district is also simplified into a single electoral division; the three divisions listed in a 1977 Order no longer apply.
What it means: decision-making will sit with a smaller elected group, and eligible voters within the district will choose from the same pool of candidates. If you follow local flood policy or teach civics, these changes are a live case study in how representation shapes public services.
So, what is an Internal Drainage Board? IDBs are public bodies created in law to manage water levels and drainage in defined low-lying districts. They maintain ordinary watercourses, operate pumps and sluices, and plan maintenance to reduce flood risk for people, farms, roads and wildlife habitats.
How they are funded matters for the voting system. IDBs are typically funded through drainage rates paid by land occupiers in the district and a special levy collected via local councils. In many boards the electorate for IDB elections is the group of ratepayers, while councils also appoint additional members to reflect residents' interests.
This Order only fixes the number of elected members at 11. Seats appointed by charging authorities (local councils) are provided for separately under Part 2 of Schedule 1 to the Land Drainage Act 1991, which keeps the balance between ratepayer voices and the wider public interest.
The first 'elected' members after reconstitution will, in fact, be appointed by the Secretary of State to get the new structure running. They serve until one year after the first 1 November that follows their appointment; for appointments made in early 2026, that points to terms ending on 1 November 2027.
Why change the electoral map? Moving from three divisions to one removes the older split created under a 1977 Yorkshire Water Authority order. With one division, candidates stand district-wide. The trade-off is simplicity versus area-based representation, a useful prompt for classroom discussion about local democracy.
How did this become law? The Environment Agency prepared a Scheme under section 3 of the Land Drainage Act 1991. The Secretary of State gave notice to the named local bodies, no objections were made, and the Scheme was confirmed with modifications through this Order.
Continuity is built in. The Order states that all property, rights and obligations of the existing Board transfer automatically to the reconstituted Board on commencement. That keeps pumps running, contracts valid and staff covered while the governance changes settle.
A few precise details for your notes: the Order was made on 26 February 2026, came into force on 27 February 2026, extends to England and Wales but applies to England only, and was signed for the Department for Environment, Food and Rural Affairs by William Harrington, Head of Rural Flood Risk. The Government did not publish a full impact assessment, stating no significant effects are expected across sectors.
What to look for next if you live or teach in the area: announcements from the Board about the timetable for appointments and future elections, updated maps of the single electoral division, and budget plans for maintenance. These are useful documents for students learning how statutory instruments shape everyday services.