WBD2Manage ditches

What it actually is

You keep managing your ditches, but less, later and more gently. The top of the ditch bank is cut in rotation so no more than half the length is cut in any year. The channel itself, the slubbing out, is done to any given section no more than once in the action's three years. All of the work happens in the autumn, winter and early spring, which GOV.UK gives as usually September to late March. And you must not re-profile the ditch or make it wider or deeper.

GOV.UK's stated aim is ditches with varied bankside and aquatic vegetation and undisturbed wildlife habitat, keeping the vegetation typical of wet ditches and providing habitat for the wildlife that uses them.

Source: GOV.UK, WBD2 action page, checked 23/08/2026.

What it pays, and what that comes to

The rate is in the panel at the top of this page, per 100 metres of ditch, covering both sides. Multiplied out:

Source: arithmetic on the payment rate shown at the top of this page, which comes from Tilth's copy of the GOV.UK action catalogue and carries its own last-checked date. The lengths are illustrations.

Is it worth it on your ground?

Step one: what it costs to put in. Nothing is established and nothing is bought. The action takes no cropped ground, because it lives on the boundary features you already have.

Step two: what it changes. Set against a regime that flails every bank top every year and slubs on a short cycle, the requirements are a reduction in work: half the cutting in any year, and in-channel work on any section at most once in three years. Whether that saves you a contractor pass or costs you drainage function depends entirely on what your current regime is, and that is your figure to put in, not ours.

Step three: where that leaves it. This is one of the smallest sums on this site, and on most farms the money will not be the reason to enter it. Per kilometre of ditch it is more than nothing for work that, on many farms, was going to be done in something like this pattern anyway. The real cost sits in step two's other direction, and it is covered under things worth watching.

Source: the payment rate at the top of this page; the requirement pattern from GOV.UK, WBD2 action page, checked 23/08/2026. The judgements in steps two and three are Tilth's own reading rather than scheme guidance.

Does it work, and what makes it work better

This section is what we have found in published sources about the practice this action pays for. It is not scheme guidance, it is not Defra's or the RPA's view, and it adds no requirement beyond what the GOV.UK action page sets out. We have named every source and given the date we checked it. What it means for your ground is your decision.

None of the work below is about WBD2 by name. It is about managing farm ditches to benefit wildlife, and this action is one way of paying for a version of that practice.

The graded assessment. Conservation Evidence, based at the Department of Zoology at the University of Cambridge, summarises the published studies behind individual conservation actions and has independent subject experts score each one. Managing ditches to benefit wildlife comes out in their category Likely to be beneficial, on 11 studies. The expert scores behind that are 40 per cent for effectiveness, 45 per cent for certainty, and harms not assessed. Both numbers sit in the lower half of the scale: the reported effects were modest and mixed, and the panel was middling-sure about how far they carry.

Source: Conservation Evidence, action 135, Manage ditches to benefit wildlife, in the Farmland Conservation synopsis, checked 23/08/2026. Cite as Dicks et al. (2020), Farmland Conservation, pages 283 to 321 in What Works in Conservation 2020, Open Book Publishers.

What the studies found, both ways. Five of eight studies from the Netherlands and the UK that looked at the effects of managing ditches found increases in something: invertebrate biomass or abundance, plant species richness, emergent plant cover, amphibian diversity and abundance, bird visit rates, or higher numbers of some bird species. Three studies found negative or no clear effects on some farmland birds or plants. At the encouraging end, a site comparison across Dutch farms found significantly higher plant diversity on ditch banks mown once in September with the cuttings removed and buffered by margin strips, at 36 to 65 plant species per 400 square metres against 26 to 34 on conventional farms, and a comparison of 42 Dutch ditches found amphibian diversity and abundance significantly higher where ditches were managed under agri-environment rules. At the discouraging end, a ten year Dutch study on dairy farms found no improvement in ditch bank plant diversity after a decade of agri-environment management, and the large English survey of 2,046 one kilometre squares found no consistent association between the length of agri-environment managed ditch and farmland bird numbers three years in.

Source: Conservation Evidence, action 135, key messages and supporting evidence, checked 23/08/2026.

A finding that belongs to a different action. The strongest single results on the page, invertebrate biomass more than doubled and bird visit rates doubled, come from a Leicestershire experiment on bunded ditches, where small dams were placed across the channel to hold water. WBD2 does not pay for bunding, and its ban on re-profiling sits close enough to that territory that we would not read those results as evidence about this action.

Source: Conservation Evidence, action 135, supporting evidence, the Aquilina and Defra BD1323 studies, checked 23/08/2026.

Conservation Evidence say themselves that the studies are not directly comparable or of equal value, and that study size, design, reported metrics and relevance to your own situation matter more than "simply counting the number of studies that support a particular interpretation". Most of the studies are Dutch, many from peat districts, which is a long way from every English ditch.

Source: Conservation Evidence, action 135, checked 23/08/2026, including the note under key messages.

What you actually have to do

Cut the vegetation at the top of the ditch bank in rotation, so you only cut up to half the length of the ditch bank in any year. Carry out in-channel management on any section of the ditch no more than once during the action's three year duration. Only manage the ditch during the autumn, winter and early spring, which GOV.UK gives as usually September to late March. Do it from the action's start date in each year of the duration, and if the start date makes the first year awkward, start within 12 months of it.

Source: GOV.UK, WBD2 action page, checked 23/08/2026.

What you cannot do on it

You must not re-profile the ditch or increase its width or depth. Outside the autumn to early spring window, you must not manage the ditch at all.

Source: GOV.UK, WBD2 action page, checked 23/08/2026.

Where it can go

Ditches that are man-made channels cut for drainage or water management, with vegetated banks, regularly holding standing or flowing water, forming part of a land parcel boundary below the moorland line. You need management control of both sides for the whole three years, and a ditch shared with a neighbour needs both the legal right and the practical ability to meet the requirements. Not eligible: ditches managed by a third party such as an Internal Drainage Board, culverts, underground drains, natural watercourses, ponds, lakes and reservoirs, grips, gutters and foot drains, and ditches in severely disadvantaged areas. It is static: the same ditches for all three years.

Source: GOV.UK, WBD2 action page, checked 23/08/2026.

What you can stack it with

The GOV.UK page's compatibility list is unusually generous: every SFI26 action except the dry stone wall action BND1 can sit on the same parcel, and the boundary lists of the arable actions on this site regularly name WBD2 alongside the hedgerow and bank actions. The buffer strip actions BFS1 and CAHL4, and the in-field grass strips of WBD3, are the natural neighbours, since a strip along a watercourse and a gently managed ditch are parts of the same picture.

Source: combinations, GOV.UK WBD2 action page, checked 23/08/2026. The last sentence is Tilth's own reading rather than scheme guidance.

Things worth watching

This section is Tilth's own reading of where this action is easy to get wrong. It is not scheme guidance, it is not sourced from Defra or the RPA, and none of it adds a requirement beyond what the GOV.UK action page sets out.

Once in three years is a drainage commitment, not just a wildlife one. The in-channel limit is the requirement with teeth. A ditch that silts quickly, takes a road's runoff, or protects a low corner of a field is a ditch you may need to slub more than once in three years, and entering it removes that option for the duration. Walk the ditches and think about the wet Februarys before the application, not after.

Both sides, for three years, is a legal question. Management control of both sides is required for the full duration. A ditch where the far bank belongs to a neighbour, or where an Internal Drainage Board has the say, does not qualify, and the time to establish which ditches those are is before they go on the form.

The definition excludes more than you might expect. Grips, gutters, foot drains, culverted lengths and natural watercourses are all out. A long ditch that ducks through a culvert mid-run is worth mapping carefully, because the eligible metres are the open, vegetated, water-holding ones.

The rotation needs a record. Cutting up to half the length in any year implies knowing, and being able to show, which half was cut when. A ditch-by-ditch note of what was cut and slubbed each winter is cheap to keep and hard to reconstruct afterwards.

It ends in late March, roughly. The working window is given as usually September to late March, wording rather than a calendar date. A cutting or slubbing job that drifts into April is outside the pattern the page describes, and the only evidence of when work happened is the record you kept.

Keeping the evidence

Also Tilth's own reading. GOV.UK sets the requirements; what follows is a practical suggestion about record keeping.

GOV.UK asks for ditch management operations records at land parcel level with their invoices, and photographs and supporting documentation. The shape of this action makes that simple: a map of the eligible ditch lengths, a note each winter of which sections were cut and which section, if any, was slubbed, the contractor invoice where there is one, and a few dated photographs. The record of the rotation is the record of compliance.

Source: evidence requirements, GOV.UK, WBD2 action page, checked 23/08/2026. The suggestion is Tilth's own.

The part only your own ground can answer

Whether a ditch can live with being touched once in three years is a question about your water, not about wildlife, and nobody can answer it from a payment rate. The farms that know are the ones with a record of which ditch was slubbed when and what the water did about it. Tilth keeps the ditch work in the field diary with everything else, which is how you find out what your own three year pattern actually is. Request an invite.