Kent’s water and the path to capacity: what the parties propose

Part 5 of 5 · Kent Water Investigation

This is the fifth and final part of a five-part Kent Local News investigation into the capacity of the county’s water supply, wastewater treatment, and chalk-stream environments to support the level of growth currently planned for the region. Part 1 (4 May) set out the picture — 97 per cent of monitored water bodies in the Medway basin and 100 per cent in the Stour failing the Water Framework Directive’s “Good” test, the 53 per cent real-terms Southern Water bill increase across 2025–2030, and the eleven at-risk treatment works named in Southern Water’s own wastewater plan. Part 2 (11 May) documented the housing-capacity gap — South East Water’s written confirmation that it can supply potable water for 6,318 of the 19,620 homes Tonbridge & Malling is mandated to deliver by 2040. Part 3 (25 May) examined the demographic engine the targets are built on. Part 4 (1 June) showed how the pressure compounds across five systems — water, land, climate, wildlife and food. This part does what the series has been building toward: it puts the documented gap to the parties seeking to govern Kent, and records their answers — and their silences.

How Kent Local News asked

On 2 May 2026 this publication wrote to ten political parties currently fielding candidates or holding seats in Kent. Each received the same letter, setting out the factual baseline assembled across this investigation — the ecological failures, the seriously-water-stressed designation, the Tonbridge & Malling capacity gap, the 7,145 homes blocked at Stodmarsh, the eleven at-risk treatment works — and asking the same five questions:

• Diagnosis. Does your party accept the body of evidence on Kent’s water and wastewater capacity? If you dispute any item, which, and on what basis?
• Supply-side. What new water-supply or wastewater-treatment infrastructure does your party propose for Kent — including the technology, the location, the target capacity in megalitres per day, and the timetable?
• Demand-side. What demand-management measures does your party support — per-capita consumption targets, leakage targets, planning-system constraints, or any policy affecting the underlying drivers of demand?
• Funding. How would your proposals be funded — consumer bills, central grant, planning levies, or another mechanism — and at what estimated capital cost?
• Trade-offs. What environmental, economic, fiscal or social trade-offs does your party accept as a consequence?

Parties were given until 17:00 on Tuesday 12 May 2026 — ten days — to reply. The letter stated that responses would be published, attributed to the named person who replied; that any text marked as a direct quotation would be reproduced verbatim; and that where no response was received, the article would record that the party had been contacted on 2 May 2026 and had not responded. Kent Local News is regulated by IMPRESS, and the survey was conducted to that standard: the same questions, the same deadline, and the same opportunity for every party.

A disclosure for readers

One of the ten parties contacted — GB Freedom — was founded by the editor of this publication, Daniel Dabin, who writes this series. Readers are entitled to know that, and to weigh it.

Kent Local News has handled the conflict in four ways. First, GB Freedom received exactly the same letter, the same five questions and the same deadline as the other nine parties — no more, and no less. Second, its position below is drawn solely from its policy already published on the public record, which any reader can examine directly; it has been given no privileged platform here that the others were denied. Third, this publication makes no recommendation as to which party’s approach is best — that judgement is the reader’s and the voter’s, not the editor’s. Fourth, GB Freedom’s policy is assessed below on the same terms as every other proposal, and held to the same scrutiny — including the question of what its plan does not solve. Concerns about this coverage may be raised with the editor and thereafter with IMPRESS, the independent press regulator.

Who answered, and who did not

Of the ten parties contacted, one provided a full, substantive response to the five questions: the Heritage Party, through its Kent coordinator, Councillor Sean Turner. A second party, GB Freedom, has a detailed water policy already on the public record (see the disclosure above). The remaining eight did not provide a substantive response by the deadline. Automated acknowledgements were received from the constituency offices of three Members of Parliament — Helen Whately, Polly Billington and Mike Martin — but no party submitted answers to the questions asked.

Party	How it was contacted	Response
Conservative	Helen Whately MP; Cllr Harry Rayner (KCC group leader)	Automated acknowledgement only; no substantive response
GB Freedom	Party office	Position on the public record (see disclosure)
Green Party	Canterbury & District Greens; national press office	No response
Heritage Party	Kent office	Full response (Cllr Sean Turner, Kent coordinator)
Labour	Polly Billington MP	Automated acknowledgement only; no substantive response
Liberal Democrats	Mike Martin MP; national press office	Automated acknowledgement only; no substantive response
Reform UK	Cllr Linden Kemkaran (KCC leader); national press office	No response
Social Democratic Party	Party online enquiry form	No response
West Kent Independents	Cllr Julia Thornton	No response
Workers Party of Britain	National office	No response

What follows is the substance of the two positions on the record, each summarised against the five questions and then assessed on its merits, followed by what can fairly be said about the eight silences.

The Heritage Party’s answer

The Heritage Party’s response, supplied by Councillor Sean Turner, was the only full set of answers received. On diagnosis, it accepted the evidence base without reservation, calling the figures a “serious and credible baseline” and adding a point of its own: that the housing “need” driving the growth has not, it argued, been proved as settled local-resident need — citing the same MHCLG position (FOI2024/08392) and Kent council confirmations that Kent Local News documented in Part 3. Its summary of the problem was that Kent faces not a normal infrastructure-planning challenge but, in its words, “managed overload”.

On the supply-side, the party declined to propose specific new schemes. It said it does not support treating “new reservoirs, pipelines, treatment works or major infrastructure schemes as a blank cheque to justify unlimited development”, and that where upgrades are genuinely needed to serve existing residents, reduce leakage and protect rivers, they should be prioritised — but that infrastructure should not be used to “retrofit capacity after politically imposed housing targets have already overloaded the system”. In place of a build programme it proposed an enforceable “infrastructure-first test” that any major allocation would have to pass before proceeding: independent confirmation of potable-water and wastewater capacity, evidence that dry-weather-flow limits will not be breached, protection for chalk streams and protected habitats, and a sequencing guarantee that homes are not occupied before the infrastructure is in place.

On the demand-side, its central proposal was to challenge the housing targets themselves — a full revalidation of the Standard Method numbers against verified local need, capacity and ecological limits — alongside pausing major allocations where water or wastewater capacity is not proven, prioritising empty homes and existing stock before greenfield expansion, and refusing development where the systems cannot support it. On funding, it argued that “funding must follow responsibility”: developer contributions through Section 106 and CIL, no approval of major development unless infrastructure funding is secured in advance, central-government funding where national policy drives demand, and no “socialisation of growth costs through higher bills for existing residents”. On trade-offs, it said it accepted that serious trade-offs exist and rejected “the current pretence that there is no trade-off”, summarising its choice as “infrastructure reality over political targets”.

On its merits: the Heritage response is the most developed account in the survey of the governance and evidence side of the problem — the question of why the targets are set as they are, and how to make capacity a binding constraint rather than an afterthought. Its infrastructure-first test is a concrete, checkable mechanism. Its limitation, on the supply side, is the mirror image of that strength: it proposes no new water capacity. Its answer to the documented potable-supply gap — South East Water’s 6,318 against 19,620 at Tonbridge & Malling — is to reduce the target rather than to add supply. That is a coherent position, but it leaves the physical shortfall to be closed by building fewer homes, which is a planning and political route, not an engineering one.

GB Freedom’s published policy

GB Freedom’s position is set out in its published Kent Water Renewal Programme. (The disclosure above applies: the party was founded by this publication’s editor; what follows is drawn from that published policy and assessed on the same terms as the Heritage answer.) On diagnosis, the policy accepts the same evidence base, citing the Water Framework Directive failures, the seriously-water-stressed designation and the 7,145 homes blocked at Stodmarsh, and framing the problem as one of capacity that neither higher bills nor higher housing targets address.

Its answer is structured as two tracks. The demand-side track rests on the party’s existing policy of a ten-year moratorium on immigration, which it argues reduces the national household projections that drive Kent’s housing targets — a national policy lever, outside the control of any county body. To that it adds a per-capita consumption target of 110 litres per person per day by 2035 (against an English average it gives as 136.5 litres, and fifteen years ahead of Defra’s statutory 2050 schedule), mandatory dual-pipe plumbing in new homes, and a mandatory 20 per cent Biodiversity Net Gain on new development.

The supply-side track is the Kent Water Renewal Programme proper: a network recycling treated wastewater to a standard fit for industry, agriculture and public infrastructure — and, the policy is emphatic, never for the household tap, which would continue to draw from the chalk aquifer and reservoirs as now. It sets a capacity target of 50 megalitres per day by 2035 and 125 Ml/d by 2045, through three nodes (Sandwich/Discovery Park, Sittingbourne/Aylesford and the Medway towns), using the same microfiltration, reverse-osmosis and ultraviolet treatment as Southern Water’s Aylesford Water Recycling Project (due to operate from 2031) and citing Israel and Singapore as precedents. On funding, it is costed: roughly £500 million phased to 2045 (a £62m pilot, then two £125m-plus stages), with the recycled water sold to industrial and agricultural customers at commercial rates — projected at £22–33m a year at the 50 Ml/d stage — on a model the policy says pays back inside ten years. It also commits to legislating a statutory 50 per cent nitrogen-reduction target by 2035 in nutrient-sensitive catchments, funded from those industrial revenues. On trade-offs, the policy presents the recycled-water route as the alternative to either abandoning growth or raising household bills.

On its merits: this is the only response in the survey that answers the supply-side and funding questions in the terms they were asked — a named technology, named locations, a capacity figure in megalitres per day, a timetable and a costed, self-financing funding model. That is a genuine distinction, and it should be stated plainly. But it carries an equally plain limitation that the disclosure obliges this publication to spell out rather than gloss: the 125 Ml/d is non-potable. It does not, by itself, add a single litre of drinking-water capacity — and the headline gap this series documented, South East Water’s 6,318-against-19,620 figure at Tonbridge & Malling, is a potable-supply gap. The policy’s route to closing it is indirect: by moving industrial and agricultural users onto recycled water, it would free freshwater currently abstracted for them back to the public supply and to depleted chalk streams. That mechanism is real, but the policy does not map the volume of freshwater it would free against the specific potable shortfalls councils face, so the size of that benefit is asserted rather than shown. Two further caveats apply on equal terms: the programme is a twenty-year, half-a-billion-pound commitment dependent on legislation and on securing industrial offtake customers that are named as candidates rather than signed, none of which a party out of government can guarantee; and its near-term nitrogen and nutrient-neutrality measures would, before the remediation delivers, tighten constraints on development rather than loosen them.

Reading the two answers against the gap

The two parties that engaged approach the same problem from opposite ends. The Heritage Party works the demand and governance side: prove the need, make capacity a binding test, and reduce the target where the capacity is not there. GB Freedom works the supply and efficiency side: build non-potable recycling capacity to free freshwater, cut per-capita demand, and lean on a national migration policy to lower the projections. They converge more than their politics might suggest — both reject business-as-usual, both want an infrastructure-first sequencing so homes do not arrive before the pipes, both want developers rather than existing billpayers to carry the cost, and both put chalk-stream protection near the centre of the case.

Set against the four documented gaps, the survey’s result is stark. On the potable-supply shortfall, Heritage would shrink the target and GB Freedom would free freshwater indirectly; the other eight did not respond to this survey. On the wastewater and nutrient constraint — the eleven at-risk works and Stodmarsh — Heritage proposes its infrastructure-first test and GB Freedom a statutory nitrogen target and recycled offtake; from the other eight, no answer. On demand, on funding, and on the trade-offs the series has set out, the same two names recur and the same eight did not reply. Kent Local News reaches no verdict on which of the two engaged approaches is the better answer; that is for readers and voters to decide. What the survey establishes is narrower and, in its way, more important: which parties were willing to put an answer on the record at all.

The eight silences

Eight of the ten parties contacted did not provide a substantive response. They were asked specific, answerable questions about a documented, regulator-evidenced problem in the county they seek to represent; they were given ten days; and they were told that non-response would be recorded. It is recorded here.

Two qualifications are owed in fairness. The survey period followed the May local elections, a demanding time for every party machine; and the national parties in particular tend to set water policy centrally rather than county by county, so a Kent-specific reply may have fallen between desks. But the questions were Kent-specific because the gap is Kent-specific, and the parties that hold or contest the great majority of the county’s seats are precisely the ones from whom a plan for the county’s water would matter most. That the two parties with the least representation at Westminster were the two that engaged is part of the record this survey set out to establish. The invitation remains open: any party that wishes to answer the five questions may still do so, and Kent Local News will publish what it receives.

Key Takeaways

• Kent Local News put five questions on Kent’s water-capacity gap to the ten parties active in the county on 2 May 2026, with a 17:00, 12 May deadline. One — the Heritage Party — answered in full; a second, GB Freedom, has its policy on the public record; the other eight did not respond.
• Disclosure: GB Freedom was founded by this publication’s editor. It received the same questions and deadline as the others; its position is taken only from its published policy; KLN makes no recommendation and assesses its plan on the same — arguably stricter — terms.
• Heritage Party: accepts the evidence, calls it “managed overload”, and proposes an enforceable infrastructure-first test plus a full revalidation of housing targets — but proposes no new water capacity, answering the supply gap by reducing the target.
• GB Freedom: the only costed, capacity-specific plan — 125 Ml/d of recycled water by 2045 across three nodes for ~£500m, self-financing, plus a statutory 50% nitrogen target. But the capacity is non-potable: it closes the drinking-water gap only indirectly, by freeing freshwater, and the scale of that benefit is asserted rather than shown.
• The convergence: both engaged parties want infrastructure before homes, developers rather than billpayers to pay, and chalk streams protected. The eight non-responders did not answer this survey.

What This Means for Kent Residents

This investigation began with a number — 6,318 homes’ worth of water against 19,620 homes mandated — and has spent five parts showing that the number is not an anomaly but the visible edge of a county-wide gap between the growth Kent is told to deliver and the water, land and environment it has to deliver it with. The purpose of this final part was not to tell residents how to vote. It was to find out which of the parties asking for their votes had an answer to the gap, and to put those answers, and the absence of answers, on the record.

The practical value of that record is in the asking. The five questions this publication put to the parties — do you accept the evidence; what would you build; how would you cut demand; who pays; and what trade-offs do you accept — are questions any resident can put to any candidate who knocks on the door, at any hustings, in any planning consultation. They are answerable. Two parties have shown they can be answered. The most useful thing a reader can take from this series is not a conclusion handed down by Kent Local News, but the standing to ask the same five questions and to judge the answers — on their merits — for themselves.

This concludes the Kent Water Investigation. Its five parts — The cost of crisis, the housing-capacity gap, the demographic engine, the cumulative impact and this multi-party survey — remain available to read in full.

Sources

• Kent Local News press enquiry to ten Kent parties, issued 2 May 2026; responses requested by 17:00, 12 May 2026 (the five-question survey instrument).
• Heritage Party response, Cllr Sean Turner (Kent coordinator), received 11 May 2026 (quoted material verbatim).
• GB Freedom, Kent Water Renewal Programme, published policy: https://gbfreedomparty.co.uk/our-program/water/ (accessed 7 June 2026).
• The factual baseline put to all parties is sourced in full in Parts 1–4 of this investigation: Environment Agency Water Framework Directive classifications (Medway, Stour); Environment Agency / Defra “seriously water-stressed” designation; South East Water capacity correspondence to Tonbridge & Malling Borough Council (2026); Southern Water Drainage and Wastewater Management Plan (2024, eleven at-risk works); Natural England / Kent County Council Stodmarsh nutrient-neutrality monitoring (7,145 homes, March 2025); Ofwat PR24 final determination (December 2024).
• Kent Local News Water Investigation Parts 1, 2, 3 and 4 (May–June 2026).