The Tonbridge Local Plan has moved from an awkward infrastructure problem to a formal government intervention. On 3 September 2026, Full Council did not approve the draft plan for Regulation 19 consultation, with members unwilling to proceed while the borough’s water-supply position remained unresolved.
One day later, Housing and Planning Minister Matthew Pennycook issued a statutory Local Plan Intervention Direction requiring Tonbridge & Malling Borough Council to start the Regulation 19 consultation by 11 September 2026 and submit the plan for examination by 31 December 2026.
The Direction forces the plan-making process forward. It does not declare the plan sound, resolve the water-supply problem or order the council to grant permission for 20,106 homes.
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UPDATE: 4 September 2026, Government directs the Tonbridge Local Plan forward
Tonbridge & Malling’s published account of the 3 September meeting says Full Council decided not to approve the draft Local Plan for Regulation 19 consultation. Council leader Cllr Matt Boughton said members did not want to proceed until there was a guarantee of water supply to the homes the Government expects the borough to plan for.
The council’s 4 September statement now confirms that it will proceed with Regulation 19 following the intervention, with consultation expected to open on 11 September.
The formal intervention came in a letter from Matthew Pennycook published by MHCLG. It is much more specific than a political request to keep working on the plan.
What the Local Plan Intervention Direction requires
The Minister relied principally on section 27 of the Planning and Compulsory Purchase Act 2004. That provision gives the Secretary of State default intervention powers where a local planning authority is failing or omitting to do something necessary in connection with the preparation, revision or adoption of a Local Plan.
The Direction requires Tonbridge & Malling to:
- Commence a Regulation 19 consultation on the plan placed before Full Council on 3 September no later than 11 September 2026 and run it for at least six weeks
- Submit that plan for examination no later than 31 December 2026, with any proposed minor modifications considered necessary after representations have been reviewed
- Refer any proposed more significant modifications to the Secretary of State so that further action can be considered
- Take no step to withdraw the plan
- Report monthly to MHCLG officials on progress
- Progress the plan through to the end of the examination process
The Minister also used section 15(4) of the 2004 Act to direct the council to publish a revised Local Development Scheme by 11 September showing those milestones.
The Direction remains in force until withdrawn by the Secretary of State. The council has until 18 September 2026 to set out any exceptional circumstances which it believes make intervention inappropriate, but the Minister expressly says that opportunity does not alter or suspend the Direction.
Planning Geek’s guide to Local Plans explains where Regulation 19 and examination sit in the plan-making process.
This is not an order to adopt 20,106 homes
The distinction matters. The Direction requires the council to consult on and submit the plan. It does not predetermine the examination or instruct an Inspector to find the plan sound.
The Minister’s own letter says the purpose of the section 27 directions is to give the plan the best possible opportunity of adoption under the legacy plan-making system, allow communities to comment and enable the Inspector to determine whether the plan is legally compliant and sound.
So the water evidence still matters. The council can make representations, infrastructure providers can make representations and the examining Inspector will still have to assess whether the strategy is justified, effective and realistically deliverable.
Why Government decided to intervene so quickly
The letter makes clear that timing was central. Plans continuing under the legacy system need to be submitted by 31 December 2026. The Minister considered that refusing to progress Regulation 19 on 3 September placed Tonbridge & Malling’s ability to meet that deadline in serious jeopardy.
He also pointed to the age of the existing Local Plan, adopted in September 2007, and the borough’s housing-delivery position. The letter records Housing Delivery Test results of 60% in 2023, 54% in 2024 and 63% in 2025, a housing-land supply of 2.89 years and a 2025 affordability ratio of 12.03.
Those factors were used to support the conclusion that the statutory and policy criteria for intervention had been met. The intervention is therefore about both plan progress and the Government’s assessment of local development needs.
The Tonbridge Local Plan still proposes 20,106 homes to 2042
The emerging Local Plan covers 2024 to 2042. The latest council material puts local housing need at 1,117 homes a year, giving a total requirement of 20,106 homes across the plan period.
The biggest single proposed allocation is land north of Borough Green. Around 2,000 homes are expected within the plan period, with the wider site having capacity for roughly 3,000 homes in total.
The Regulation 19 material also gives the Borough Green allocation a substantial employment role, with about 33,200 square metres of employment floorspace. Other large housing sites are spread around Tonbridge, Kings Hill, Snodland, Aylesford and Hildenborough.
This is why the water problem is not confined to a single development. The infrastructure consequences are distributed across much of the borough.
South East Water says there is no spare headroom
The core infrastructure problem has not disappeared. South East Water told the council that it currently lacks available headroom in its supplies in Tonbridge & Malling and would be unable to accommodate growth above the forecast assumptions in its Water Resources Management Plan 2024 throughout the Local Plan period.
The company’s formal Local Plan response is careful about what that means. It is not saying that every proposed home is unsuppliable. It is saying that the level of growth now being planned exceeds the growth assumptions already embedded in WRMP24 in an area where there is no spare supply-demand margin to absorb the difference.
Planning Geek has a wider guide to water scarcity and planning, including the tension between the planning system’s housing timetable and the statutory investment cycles used by water companies.
The housing assumptions have moved faster than the water plan
Earlier infrastructure work recorded that South East Water’s current WRMP24 assumptions were based on materially less growth than the emerging Local Plan now needs to accommodate. The Local Plan housing requirement has since settled at 20,106 homes across 2024 to 2042.
South East Water is feeding the higher growth assumptions into its next statutory plan, WRMP29. The utility has indicated that an updated demand baseline should emerge in spring 2027, with proposed interventions following in spring 2028.
Demand reduction, leakage work, smart metering, transfers and larger supply interventions can all form part of the response. The difficulty is timing. A Local Plan being submitted in December 2026 is being tested before all of the next water-resource plan’s answers are due to be settled.
Government says there is a route forward, but not that the problem is solved
The intervention letter acknowledges the collaborative work already undertaken by the council and other bodies to identify solutions to the water-supply issues. The Government is plainly unwilling to allow those issues to stop Regulation 19 and submission altogether.
That is different from saying water capacity is no longer a planning concern. The evidence will still need to show how development can be supplied at the point it comes forward and how any necessary infrastructure can be delivered in step with the plan.
The emerging plan can use policies, phasing, water-efficiency requirements and infrastructure mechanisms to manage risk. But a planning policy cannot physically create treatment capacity, network reinforcement or a new strategic water source.
Water is already affecting individual planning applications
This has already moved beyond plan-making theory. Tonbridge & Malling has said that water supply can be a material planning consideration on current applications and has published dedicated guidance on water supply and planning applications.
At Aylesford, councillors deferred an outline application for up to 1,300 homes east of Kiln Barn Road and west of Hermitage Lane in March 2026 so that further information could be provided about potable-water supply and infrastructure capacity.
The question for individual applications will depend on the evidence, the timing of development and whether suitable mitigation or phasing can make the proposal acceptable. The Government’s Local Plan Direction does not automatically answer those site-level decisions.
What happens next
Unless the Direction is changed or withdrawn, the immediate timetable is now unusually tight:
- By 11 September 2026, Tonbridge & Malling must commence the Regulation 19 consultation and publish a revised Local Development Scheme
- The consultation must run for at least six weeks
- The council must consider the representations and can propose minor modifications before submission
- More significant proposed changes must be put to the Secretary of State
- By 31 December 2026, the plan must be submitted for examination
- The council must report progress to MHCLG monthly and continue the plan through examination
The key battleground therefore moves from whether the council will proceed at all to whether the evidence presented through Regulation 19 and examination can demonstrate a sound and deliverable strategy despite the outstanding water constraints.
The wider planning lesson
Tonbridge & Malling is an unusually clear example of two statutory systems moving on different clocks. The planning system is demanding a Local Plan now. The water-resource planning process is still developing the next generation of supply and demand interventions.
The Government has now made its position unmistakable: the infrastructure uncertainty is not a reason to stop plan-making before Regulation 19 and examination. But it remains an issue that the plan will need to confront and the Inspector will need to test.
A Local Plan can allocate land. A planning permission can authorise houses. Neither can manufacture drinking-water capacity overnight.
For anyone following the examination, Planning Geek’s guides to the development plan, Local Plans and the NPPF 2026 provide the wider policy background.
Read the intervention direction
Planning Geek hosts the 4 September 2026 Local Plan Intervention Direction in our own library. The earlier link to the MHCLG publication page remains the authoritative government source.
Created: 1st September 2026
Updated: 5th September 2026
