Development Intent
AtlasMertonOfficersLeigh Harrington
Case officer · Merton Planning

Leigh Harrington.

Recently active — last recorded decision Sep 2025

A case officer at Merton with an approval rate of 80% across 492 decided planning applications, spanning 34 wards.[1] Decision speed and appeal performance publish when decision notices are ingested.

Planning officer492 decisions80% approvalSave
Merton · ward map
Approval rate — by ward
Lower ~68%
Higher ~90%
ShowingAll years · subscriber →across all years on record — a period re-scopes the headline figures and the trend
At a glanceEach metric links to the investigation behind it
All investigations →
492
Applications
2020–25
Approval rate over time — tougher or softer 🔒Dashed line = London average
avg 81%81%202083%202177%202275%202386%202472%2025
Approval-rate trend is subscriber dataSubscribe to see the trend →
What they decide — by application type
How they compareVersus peers
Approval rate80% · 14th of 17
higher is betterdashed = London avg
Decision time · publishes with decision notices
in development
Appeal overturn · publishes with decision notices
in development
How this officer decides — from their own reports393 officer reports parsed
25%
Approves despite concerns
of approvals record a documented reservation
4%
Negotiated approvals
approvals mentioning revisions/amendments
6%
"On balance" reports
reports using explicit balancing language
79%
Bespoke reasoning
of report text written for the case, not recited
What they write about — vs Merton's average officer

Topic mentions per 1,000 words of their own report text (boilerplate stripped), indexed against all parsed Merton reports. Attention, not stance.

Energy & sustainability
1.55× borough avg
Outlook & amenity
1.46× borough avg
Noise & disturbance
1.39× borough avg
Precedent & consistency
1.27× borough avg
Bulk & massing
1.17× borough avg

Mark = borough average (1×). Bar capped at 2×.

How they reason — coded from their reports

Harrington's caseload spans everyday householder extensions through change-of-use and small commercial schemes, and his reasoning routinely opens by explicitly naming the 'planning considerations in this case' as a short list before working through each in turn — a structural habit that keeps mixed-use/commercial refusals (HMO fire-safety, shopfront servicing capacity) legible alongside routine amenity paragraphs. His refusals cluster around retail/frontage vitality (Sites and Policies Plan DM R4's 50%-commercial-use threshold for secondary shopping frontages) and heritage/conservation-area harm where a roof extension departs from the prevailing form of a specific named street, and he is comfortable citing a directly comparable recent refusal on the same or an adjoining site as precedent for a current recommendation.

Observable habits

· opens each report with an explicit named list of 'the planning considerations in this case relate to...' before addressing each one as its own sub-paragraph, even for straightforward householder schemes

· on retail/change-of-use refusals, checks the proposal against the Sites and Policies Plan's own numeric frontage-mix threshold (DM R4's 50% commercial-use requirement) before any design or amenity discussion

· cites a specific, recently-decided precedent on the SAME or an adjoining site (by application reference) as the anchor for a current recommendation, rather than a general area-character statement

What their reports consistently look for

· whether a retail change of use would drop the frontage below the Sites and Policies Plan's minimum commercial-use percentage

· whether a recent refusal or approval exists on the same or an adjoining site that the current scheme should be measured against

· whether a roof/heritage-sensitive alteration departs from the prevailing form of the specific named street rather than the area in general

Assigned Leigh Harrington on a live case?What they pay attention to, how they reason, and what their reports consistently look for — so you can address it before they raise it.Subscribe to unlock →
In their own words

These considerations are therefore the same as those for the recent refusal LBM ref 19/P3896

20/P0493

For this designated secondary shopping frontage approximately 50% of units should remain in commercial uses (A1, A2, A3, A4 and A5 uses), taking into account unimplemented planning permission for change of use

20/P0383

Measured from 393 published Merton officer reports written by this officer, with recited policy boilerplate stripped before any counting. These describe how this officer works and writes — they are not outcome predictions. Every quote is from a named public report.

Policy playbook — what this officer cites[3]

The policies this officer cites most in their own reports — times cited across 393 parsed reports. Whether refusals citing each survive appeal isn't traced per policy yet.

DM D2
257 times cited
CS14Design. Strategic
254 times cited
DM D3
194 times cited
D3List of Buildings of Special Architectural or Historic Interest
166 times cited
DM D1
75 times cited
CS20Parking, Servicing and Delivery. Strategic
70 times cited
CS15Climate Change. Strategic
55 times cited
CS18Active Transport. Strategic
54 times cited
Which policies this officer leans on is subscriber intelligenceSubscribe to unlock →
Decisions by ward
Ward
Decisions
Approval rate

Where this officer's caseload concentrates, 2020–25.[1] Click the map above to focus this page on a ward, or a row to open the ward.

Recent applications
Address
Reference
Type
Outcome
Date
25/P0315
Full Planning Permission
Refused
2025-12-18
25/P1683
Full Planning Permission
Approved
2025-11-04
25/P0315
Full Planning Permission
Refused
2025-12-18
25/P1683
Full Planning Permission
Approved
2025-11-04
Full application history locked
Subscribe to see all 492 decisions →
Consultants approved most— subscriber data
1. Planning Additions
2. Circle-Z Limited
3. Eurohaus Germany Ltd
4. Coba Design Ltd
At a glance
OfficerLeigh Harrington
BoroughMerton
RolePlanning officer
Experience
Applications492 (2020–25)
Approval rate80%
London approval avg81%
Who decides here
GovernmentMayor of LondonCouncilCommitteeOfficersDecisionsApplicantsInspectorate
Related investigations
When committees overrule officers like this one →
How often members depart from officer recommendations, and how those overrides fare at appeal.
How much gets decided without a committee →
The delegated share by borough and officer — where the real power over decisions sits.
Sources & method
  1. [1]Applications decided, approval rate, per-year trend and ward breakdown — London Borough of Merton planning register and published decision notices, 2020–25. · methodology
  2. [2]Appeal overturn and decision-time benchmarks — Planning Inspectorate (PINS) appeal decisions and application date pairs; not yet computed per officer, shown as a dash until they are. · PINS appeals casework
  3. [3]Condition load — Merton's decision-notice parsing is limited coverage, so no borough or officer figure is shown.
  4. [4]"How this officer decides", the policy playbook and all quotes — parsed from 393 published Merton officer reports written by this officer, recited policy boilerplate stripped before counting; disposition text coded from their own reasoning with every quote machine-verified verbatim. Descriptive of how they work — not outcome predictions.
Methodology is published in full so every number is traceable to its primary source.