Hypothesis 3: Legal and structural explanations for the MPA trawling ban u-turn

From FletchWiki

Hypothesis

The rejection of site-wide bans is not merely a political decision but the emergent output of how the UK's legislative framework is institutionally designed and interpreted — combined with a genuine (if exploited) legal constraint from post-Brexit TCA obligations.

Verdict

Substantially supported. The feature-based approach is the default output of how the Marine and Coastal Access Act 2009 is institutionally interpreted, reinforced by the Fisheries Act 2020's multi-objective balancing framework, an administrative culture of minimum necessary intervention, and a Secretary of State confirmation process that gives ministers a structural veto. The government's "not in line with legislation" language is not a precise statement of statute — Section 129 MCAA plainly permits site-wide byelaws on its face — but it is a shorthand for a complex institutional position. Crucially, the government simultaneously faces OEP investigation for insufficient marine protection under the Marine Strategy Regulations 2010, creating a legally contradictory position: it argues that wider bans are legally impermissible while another body of law may require them.

1. What legislation is the government relying on?

DEFRA's precise rejection language in HC 1272: "Blanket bans are disproportionate and not in line with legislation." Three statutes shape this claim.

Marine and Coastal Access Act 2009 (MCAA)

  • Section 129(1) gives the MMO power to make byelaws "for the purpose of furthering the conservation objectives stated for an MCZ in England."
  • Section 129(2) states byelaws "may be made so as to apply to any area in England" — on its face, this permits site-wide byelaws. The government's "not in line with legislation" claim is not straightforwardly supported by the statutory text.
  • Section 126 establishes a socioeconomic balancing test for authorisations affecting MCZs: an activity can be authorised if "the benefit to the public of proceeding with the act clearly outweighs the risk of damage to the environment." While formally about authorisation decisions rather than byelaw-making, the MMO/DEFRA interpret this balancing philosophy as pervading the entire management regime.
  • Section 132(3) (interim byelaws only) states that the area covered "must be no greater than is necessary for the purpose of protecting the feature in question." This proportionality-of-scope constraint appears only in interim byelaws — but the MMO appears to apply its spirit to permanent byelaws too.
  • Section 130 (Secretary of State confirmation): byelaws proposed by the MMO require ministerial confirmation before coming into force. This creates a structural veto point where political and economic considerations formally re-enter.

Fisheries Act 2020

Inserted new offshore byelaw powers (Sections 129A–129C of the MCAA). Crucially, Section 1 defines eight co-equal fisheries objectives, including:

  • The sustainability objective — integrating both environmental sustainability and economic/social benefit
  • The ecosystem objective — requiring that "negative impacts on marine ecosystems are minimised and, where possible, reversed"
  • The precautionary objective — "the absence of sufficient scientific information is not used to justify postponing or failing to take management measures"

The NFFO explicitly invokes the Fisheries Act: "What a mockery this makes of the Fisheries Act and its requirement to balance social, economic, environmental and food production factors." The feature-based approach is designed to satisfy this multi-objective framework by restricting fishing only where scientific evidence demonstrates harm to specific features.

Conservation of Offshore Marine Habitats and Species Regulations 2017

The UK's retained Habitats Directive for offshore waters. Regulation 26 imposes a duty to prevent deterioration of habitats; Regulation 29 provides for "considerations of overriding public interest" — building in a proportionality escape valve. These regulations also require that individual activities not adversely affect site integrity, but apply to specific assessments rather than requiring pre-emptive blanket bans.

The key legal structure the government exploits

None of the three legislative frameworks require site-wide precautionary bans. They require management measures where conservation evidence demonstrates harm, with a background expectation of proportionality. The government reads "not in line with legislation" to mean that a site-wide ban, without prior feature-level harm assessment, bypasses the statutory evidence-based procedure Parliament intended.

What the government cannot easily argue: Section 129 MCAA plainly permits site-wide byelaws. The government's claim is almost certainly not that the MCAA forbids them, but that the overall legislative scheme — the Fisheries Act's balancing objectives, the evidence-based Section 126 process, the MMO's procedural duties — makes a blanket pre-emptive ban incompatible with how Parliament intended the framework to operate.

2. Legal challenges to the "disproportionate" argument

ClientEarth

ClientEarth has not filed a legal challenge directly against DEFRA's feature-based approach to UK MPAs. Their UK marine activity has focused on the government's use of Brexit powers under the Habitats Regulations. They have called for "enforcement" of Reed's June 2025 UNOC pledge but no UK proceedings are on record. In parallel, they have highlighted an EU General Court ruling that "MPAs must be effectively safeguarded from harmful fishing practices" — a normative argument rather than binding UK law post-Brexit.

Wildlife Trusts and NGOs

No formal judicial review of the "disproportionate" characterisation has been filed by any UK NGO. The Wildlife Trusts challenge the government on evidentiary grounds: "We question if the evidence base for which feature maps are based, much of which is based on modelling and very limited monitoring data, is of sufficient confidence to take a features-based approach." This is an implicit legal argument — if the feature maps are scientifically uncertain, the Fisheries Act's precautionary objective requires broader protection, not narrower — but it has not been brought to court.

The OEP investigation (most significant legal development)

The OEP launched a formal investigation on 8 January 2025, escalated to an information notice on 19 September 2025. Alleged failures under the Marine Strategy Regulations 2010:

  • Regulation 4(1): failure to take necessary measures to achieve Good Environmental Status (GES) of marine waters by the statutory deadline of 31 December 2020
  • Regulation 14: insufficient programme of measures
  • Regulation 15: improperly claiming exceptions from the GES duty — "seeking to duck these targets"

GES Descriptor 6 specifically addresses sea floor integrity, requiring that seabed not be adversely altered so as to impair ecosystem structure and function. Bottom trawling is the primary cause of seabed physical disturbance. The OEP investigation therefore directly concerns bottom trawling management in MPAs, even if the press releases do not name it explicitly.

The contradiction: The government argues site-wide bans are "not in line with legislation" while simultaneously facing OEP investigation for failing to comply with a different body of legislation that may require exactly the comprehensive seabed protection that site-wide bans would provide. The government is arguing that one set of law (MCAA/Fisheries Act) prevents action that another set of law (Marine Strategy Regulations 2010) may demand.

3. The "where needed" loophole: who decides?

The original government commitment was to have byelaws protecting all offshore MPAs "where needed" by end of 2024. This was missed. The phrase "where needed" does not appear in the legislation — it is in government commitments and Environment Act targets only.

The formal process

  1. JNCC and Natural England (Statutory Nature Conservation Bodies) set conservation objectives for each MPA and advise on which activities hinder them.
  2. The MMO conducts site-level assessments of whether activities are "compatible with the conservation objectives." If not, it may introduce management measures, including byelaws.
  3. The Secretary of State must confirm byelaws before they come into force (Section 130 MCAA). There is no statutory requirement that the Secretary of State must confirm a byelaw the MMO proposes. This is the structural veto point.

How "where needed" has been operationalised

The "where needed" threshold is set not purely on scientific/conservation grounds but filtered through MMO site-level assessments incorporating socioeconomic considerations. Measures are proposed only where evidence of harm to specific features is sufficient to survive the Section 126 public-benefit balancing test. This raises the intervention threshold compared to a precautionary approach.

The Wildlife Trusts challenge the reliability of the feature maps on which this depends. If the maps are uncertain, the Fisheries Act's precautionary objective (Regulation 4: "the absence of sufficient scientific information is not used to justify postponing management measures") militates for broader protection.

Evidence suggests the "where needed" threshold has effectively tightened through administrative practice even as ministerial commitments remained broadly stated.

4. Is the feature-based approach a bureaucratic design choice?

Strong circumstantial evidence that the feature-based approach is the MMO/DEFRA system's preferred regulatory design, independent of ministerial direction:

  1. Statutory architecture rewards it. MCZ conservation objectives are formulated in feature-specific terms (e.g. "maintain condition of subtidal sandbank feature"). The MMO reads byelaw-making power as limited to furthering those objectives — i.e., targeted at mapped features. This is contestable but generates a smaller footprint of restriction, easier to defend at confirmation stage and less exposed to industry judicial review.
  1. Administrative tractability. Feature-based assessments create a paper trail satisfying the Section 126 proportionality logic. A site-wide ban, by contrast, risks judicial review by industry for lacking evidence of harm to non-feature areas. The NFFO makes exactly this argument: "trawling does no damage to large parts of those sites."
  1. MMO enforcement culture. MMO Compliance and Enforcement Strategy states: "Any action taken by the MMO, including monitoring, compliance or investigation, is proportionate to specific, identified, risk." This institutional culture shapes how byelaw discretion is interpreted — defaulting to minimum necessary restriction.
  1. Secretary of State veto. Even if the MMO proposed a site-wide ban, ministerial confirmation is required. This structural block operates regardless of scientific advice, giving ministers a legally defensible way to limit scope without formally overriding JNCC/Natural England.
  1. Stage 3 language confirms the default. Even the apparently "site-wide" June 2025 Stage 3 proposals are framed as "managing the impacts of fishing on all seabed features in MPAs" — the system is institutionally incapable of conceptualising protection outside feature-based terms.
  1. Historical design from inception. The phased MCZ designation process (2013 onwards) chose a feature-based approach from the outset, citing "burden of evidence." The entire management framework was built on the assumption that protection would follow habitat mapping, leaving un-mapped areas unprotected by default regardless of precaution.

5. Post-Brexit constraints

UK fishing as a Brexit prize

The TCA transferred 25% of pre-Brexit EU quota in UK waters to UK vessels over a 5.5-year transition ending 30 June 2026. This created a political dynamic in which both Conservative and Labour governments were under pressure to be seen as protecting UK fishing interests, not restricting domestic vessels from historically accessed areas.

TCA non-discrimination constraint

Under TCA Article 494(3)(f), UK conservation measures must be "proportionate and non-discriminatory." MPA byelaws apply equally to UK and EU vessels — so the discrimination argument is legally weak. However, France tested this aggressively: Minister Jean-Noël Barrot demanded "an in-depth examination of the potentially discriminatory aspect of this closure, so that retaliatory measures can be taken if necessary." Legal analysis (including from BLOOM) showed France's argument was weak, but the diplomatic threat created a chilling effect on pace and scope of implementation.

The April 2025 sandeel arbitration ruling (first TCA case) found that for English waters, the UK failed to demonstrate proportionate consideration of EU vessel rights. The Scottish ban was upheld because Scottish decision-makers "explicitly balanced ecosystem benefits against economic costs to EU and UK industries." This creates a genuine (if usable as cover) legal requirement for proportionality analysis before implementing site-wide bans that affect EU vessels — a real constraint that conveniently aligns with the feature-based approach.

2026 TCA renegotiation

With EU access provisions expiring 30 June 2026, the UK-EU fisheries relationship required renegotiation throughout 2025. The government had structural incentives to avoid a site-wide byelaw programme that triggered French arbitration proceedings during this window.

Assessment

Element Evidential support
Feature-based approach is MCAA system's institutional default Strong
Section 126 balancing test and Fisheries Act multi-objective framework justify proportionality argument Strong (though not a legal bar on site-wide bans)
Secretary of State confirmation requirement is a structural political veto Strong
"Where needed" operationalised to raise intervention threshold Strong
OEP investigation contradicts "not in line with legislation" argument Moderate — different legislation, but reveals internally inconsistent government position
TCA non-discrimination creates genuine (not just convenient) legal constraint Moderate — sandeel ruling creates real risk, but is not a formal bar
Officials explicitly designed feature-based approach to minimise industry legal challenges Weak — consistent with evidence but not documented
"Not in line with legislation" is literally true about Section 129 MCAA Weak — Section 129 plainly permits site-wide byelaws on its face

Most accurate characterisation: The feature-based approach is the emergent output of a legislative framework requiring evidence-based feature-linked byelaws; an administrative culture defaulting to minimum necessary intervention; a Secretary of State confirmation process allowing political review; a post-Brexit environment elevating fishing industry interests; and a TCA diplomatic constraint making site-wide bans politically costly. The government's "not in line with legislation" language is shorthand for this complex institutional reality, not a precise statutory claim — and its simultaneous OEP jeopardy shows the bureaucratic comfort zone is itself in breach of a different set of legal obligations.

Sources

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