The Storrington Appeal Decision: A Small Neutrality Breakthrough?

A Side: Bridge Over Troubled Water

Thank you, Heather Sargent, for sharing this appeal win on LinkedIn. This is what I turn to LinkedIn for, rather than for posts about legal directory rankings!

This decision letter dated 6 October 2023 is a must-read for anyone grappling with Conservation of Habitats Regulations issues in relation to nutrient/water neutrality or recreational impact issues.

In summary, the Inspector, Michael Hayden was faced with two identical appeals against the refusal of planning permission relating to proposed residential development  (up to 78 homes). The site straddles the South Downs National Park Authority and Horsham District Council areas.

There were various issues to be determined by the inspector but I just want to focus on one:

“the effect of the proposed development on the integrity of the Arun Valley Special Area of Conservation, Special Protection Area and Ramsar sites, with particular reference to water abstraction, taking account of the proposed water neutrality measures.”

I first covered the north Sussex water neutrality issue in my 19 October 2021 blog post Development Embargos: Nitrate, Phosphate & Now Water. This is equivalent to the nutrients issue which of course has recently been so much in the news – and where we await a fresh Bill to re-present the legislative fix rejected by the House of Lords in its report stage debate on the Levelling up and Regeneration Bill (see eg my 16 September 2023 blog post NN No).

One of the frustrations surrounding the neutrality veto has been with the approach of Natural England and local planning authorities, which have been disinclined to accept that, given that any adverse effect on the integrity of the relevant SAC or SPA only occurs when the homes are occupied, in appropriate circumstances planning permission can still lawfully be granted, and reserved matters applications and pre-commencement condition discharge applications approved, with a Grampian condition preventing occupation until a satisfactory solution is in place to ensure no adverse effect. Whilst it is said that this just kicks the can down the road – who will build if there is no certainty as to occupation? – in some circumstances it can assist, where for instance there will in any event be a long development lead time and the developer is prepared to take the risk that in due course a strategic solution will have been arrived at and implemented – and is prepared to contribute to the costs of that solution and generally seek to ensure that it is achieved.

So what is so interesting about the Storrington decision letter is that the appellant took this issue head-on. And the inspector accepted its approach. See paragraphs 67 to 109 of the decision letter. If your work involves neutrality issues, it’s worth reading them in their entirety.

The appellant’s position was that its scheme incorporated various measures to reduce the increased demand for mains water from the proposed development:

“76. In order to achieve water neutrality, the appellant proposes to mitigate the increased demand for mains water from the proposed development through a combination of on-site water reduction measures and an off-site offsetting scheme. In terms of on-site measures, it is proposed to install water efficient fixings, and greywater recycling and rainwater harvesting systems into each dwelling. It is common ground that these measures would reduce potable water consumption from the residential development to 8,129.07 litres per day, subject to suitable management and maintenance to ensure they are effective.

77. The signed and executed UU contains obligations requiring an On-Site Water Neutrality Scheme to be submitted to, and approved by, the LPAs and implemented prior to first occupation, which would include a regime for the management and maintenance of greywater recycling and rainwater harvesting systems by a management company. I am satisfied this would provide a legally binding mechanism for the LPAs to ensure the long term effectiveness of the measures to reduce potable water use to the required level within the proposed residential development. This position was confirmed by the Council’s witness in oral evidence at the Inquiry.”

Over and above these measures:

“79. The appellant seeks to rely on one of two alternative means of offsetting the residual water demand of the proposed development:

• payment of a fee or tariff into an LPA-led offsetting scheme for the Sussex North WRZ as a financial contribution towards an equivalent reduction in mains water demand elsewhere in the WRZ (the strategic offsetting scheme); or

• installation of a rainwater harvesting scheme at a garden centre in Horsham that would deliver an equivalent reduction in mains water use (the site specific offsetting scheme).

80. The strategic offsetting scheme is not yet in place, but how it would operate is explained in the Mitigation Strategy prepared for the Sussex North WRZ45. The first element of the Strategy is a programme being implemented by Southern Water to reduce water demand across the network by reducing leakages and household water consumption. This is expected to mitigate a large part of the increase in demand from committed and planned housing growth in the WRZ in the period 2021-2039.

81. The balance of the increased water demand is proposed to be mitigated through an LPA-led offsetting scheme, comprising a series of measures to reduce water demand in social housing and property under LPA control, which would be funded by a tariff on all new development per litre of mains water required to be offset. The most significant measure would be a programme for retrofitting flow regulators into existing social housing stock within the WRZ managed by local authorities or registered social landlords (RSLs), the effectiveness of which has already been demonstrated in trials.”

“83. On the question of prioritisation, the Mitigation Strategy recommends that priority should be given to sites allocated in local plans or identified in the associated housing trajectories, such as through the allowance for windfall, albeit not strategic-scale windfall49. In this case, around two-thirds of the proposed residential part of the appeal site is allocated for housing in the SSWNP. The housing proposed on the part of the site allocated for allotments would count as windfall provision, not at a strategic scale, for which an allowance is included in the housing trajectory for Horsham district from 2024/25 onwards50. If allowed therefore, the appeal site should be a candidate for priority of access to water neutrality via a payment to the offsetting scheme, given that it forms part of the planned and projected housing growth in Horsham district.

84. I recognise that the governing body for the strategic offsetting scheme is likely to have choices to make in terms of an order of priority for permissions to access the scheme, particularly early on in its operation. However, if the appeal proposals were allowed, the appellant confirmed that they would not need to rely on the strategic offsetting scheme for a period of 18 months from the grant of planning permission, whilst reserve matters were dealt with, the allotments relocated and site infrastructure laid. By that time (early 2025), the LPA-led offsetting scheme would have been operating for around 12 months and offsetting capacity from the SW programme is likely to be available to contribute to water neutrality in planned housing schemes. Furthermore, under the suggested standard time limit condition, the appellant would have up to 5 years from the grant of planning permission for the outline residential component of the proposed development to be implemented. By then (mid-2028), the strategic scheme would have been operating for over 4 years, with further offsetting capacity added to the scheme by both the LPA-led and Southern Water programmes.

85. Therefore, there is firm evidence that the proposed development would be able to access offsetting capacity within the strategic scheme to mitigate its residual water demand. However, case law establishes that in order for a competent authority to reach a conclusion under Regulation 63 of the Habitats Regulations that a project will not adversely affect the integrity of the European site, there must be no reasonable scientific doubt. In order to provide the necessary degree of certainty, the appellant has proposed a ‘Grampian’ condition and an obligation in the S106 UU, the effect of which would be to prevent implementation of the proposed development until a payment is made to HDC under the strategic offsetting scheme and water neutrality secured.”

The inspector noted that the threshold for imposition of a Grampian condition is simply that it would not be the case that there are “no prospects at all” of the action in question being performed within the time-limit imposed by the condition. “The Council’s evidence is that there is a very slim, 5%53 prospect of the appeal proposal being able to offset its water demand through the strategic scheme during the lifetime of any permission. A slim prospect does not amount to no prospect at all. Therefore, the condition would be reasonable in terms of the likelihood of access to the strategic offsetting scheme.”

The council was worried about the precedent effect but the inspector considered that each application needs to be determined on its own merits.  “In this case, I have established above that a large part of the residential component of the appeal site is included in the planned housing growth in Horsham District, and the remainder would contribute to the windfall allowance in the housing trajectory, both of which the Mitigation Strategy recommends should be priorities for the strategic offsetting scheme. Accordingly, the condition would not be unreasonable on this count either.”

He considered that the measures set out in the section 106 unilateral undertaking would be workable in practice and met the requirements of Regulation 122 and of section 106 itself.

But what about Natural England’s objection?

“93. NE’s position with regard to the strategic offsetting scheme remains that whilst the mitigation strategy is evolving, decisions on planning applications should await its completion or demonstrate water neutrality by other means. Whilst the advice of NE as the expert national agency on this matter carries significant weight, case law establishes that, as the competent authority, I may lawfully depart from this advice, provided I have cogent reasons for doing so.”

After analysis he considered that he did.

The appeal was allowed. The relevant planning condition reads as follows:

“16. No development shall commence that results in an increased use of potable water when compared with the existing baseline water usage at the site until either:

(1) Water neutrality mitigation has been secured via the Council’s adopted Offsetting Scheme (in line with the recommendations of the Sussex North Water Neutrality Study: Part C – Mitigation Strategy, Final Report, December 2022) as set out in the Planning Obligation that accompanies this planning permission and this has been confirmed in writing by the Local Planning Authority; or

(2) The site specific Water Neutrality Mitigation Scheme set out in the Planning Obligation that accompanies this planning permission has been implemented in accordance with the requirements set out in the Planning Obligation and the Local Planning Authority has given its written confirmation of the same.”

Horsham District Council had applied for costs, partly on the basis that “the Appellant did not submit their full case on water neutrality with the appeals, delayed the provision of key information on their revised water neutrality strategy until 31 January 2023, and presented information on rainwater yield coefficients in an inaccurate and misleading way, leading Natural England and the Council to misinterpret the case, and the Council to incur unnecessary and wasted expense in terms of counsel’s advice and officer time redrafting its evidence.”

That costs application was refused.

This is a decision which will cause ripples but in my view is wholly in line with the regime set out in the Conservation of Habitats Regulations and potentially applicable to issues relating to, for instance, nutrient neutrality or recreational impact (eg Chiltern Beechwoods SAC).

B Side: Keep The Customer Satisfied

Phew, no politics in this blog post. After my midweek Drive Time post I was politely asked by a reader to keep politics out of my comments on planning. I think it was felt that simonicity had become simon15minicity. All reaction is good, and thank you for it, but the request is difficult, given that the whole of the planning system is a political construct and given that every legislative stub that we have to navigate around is the result of an often short-term political decision in the past. We arrive at a better planning system by seeking to ensure that those political decisions are as considered as they need to be. I also had push-back from a couple of people at my characterisation of the prime minister’s comments on 15 minute cities as “bizarre”. I would simply refer readers to the numerous fact-check pieces out there (see eg Full Fact). Whether wilful or in ignorance, I don’t think there really is an excuse for mixing up the 15 minute city concept (previously supported by the Government – see eg this 31 March 2023 statement) with traffic management measures in cities such as Oxford to ration use of road space and prioritise active travel. At the recent Oxford Joint Planning Law Conference, that hotbed of woke radicalism, Jonathan Porritt spoke of the dangers of each of us being a WeWeBe: a well-informed, well-intentioned, bystander. Let’s not be that. We can avoid that whilst maintaining party political neutrality. If people who know about something don’t say something, who will?

The neutrality concept needn’t mean that nothing at all can be done – or said.

Simon Ricketts, 7 October 2023

Personal views, et cetera

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