How Leeds Got Stuck with a Duplicate Image Problem: The Road to This Point

Leeds City Council is facing a backlog of duplicate and outdated images embedded across dozens of its public-facing digital platforms, a problem that planners and archivists say has been building since at least 2019 when the authority began migrating legacy content onto a unified content management system without a systematic audit of what it was carrying across.

The issue matters now because the council is mid-way through a £4.2 million digital transformation programme — launched formally in March 2025 — that is supposed to consolidate its planning portal, the Leeds Local Plan interactive map, and the city's heritage assets register into a single accessible interface. Duplicate images, some of them incorrectly geo-tagged or attached to the wrong planning applications, are slowing that work down and, in a handful of documented cases, leading residents to believe demolished or substantially altered buildings still stand in their original form.

Where the Problem Took Root

The roots of the duplication issue trace back to two separate digitisation drives. The first ran between 2017 and 2020, when Leeds City Council worked with West Yorkshire Archive Service to scan thousands of photographs from the Leodis photographic archive — a collection that documents Leeds neighbourhoods from the late nineteenth century through to the 1990s. The second came during the pandemic, when planning officers, working remotely, began uploading site photographs to the council's planning portal without a shared naming convention or deduplication check in place.

Kirkgate Market and the Headrow Conservation Area both appear prominently in the affected records. Multiple versions of the same elevation photographs for listed buildings along Park Row have been identified by the council's own digital team, with some images appearing under three or four separate application reference numbers. The Aire Street regeneration zone, which has seen substantial change since 2021, is particularly problematic: photographs taken before demolition work began are still indexed alongside current site images, with no clear flagging to distinguish them.

Leeds Civic Trust, which monitors heritage matters across the city, has raised concerns through formal correspondence with the council about the accuracy of publicly visible records, though the full content of that correspondence has not been published.

What the Council Is Now Doing About It

The council's Digital and Technology Service directorate confirmed in a written update to the council's Resources and Housing Overview and Scrutiny Board in May 2026 that a deduplication audit was underway, targeting approximately 14,000 image records across the planning and heritage platforms. Officers have been working with a Manchester-based digital records consultancy, brought in on a contract worth just under £180,000, to run automated matching algorithms before human review.

The audit is expected to complete its first phase by October 2026, with a second phase covering the Leodis archive integration scheduled for early 2027. The council has also said it will introduce a mandatory metadata standard for all planning application photographs submitted after January 2027, requiring GPS coordinates, a date stamp, and a unique site reference code.

For residents and developers using the planning portal right now, the practical advice is straightforward: cross-reference any site photograph on the Leeds Planning Portal against the application submission date, and if an image appears to predate a known demolition or significant alteration, contact the planning case officer directly using the reference number attached to the application. The Kirkstall Road and South Bank regeneration areas are among those where historic images are most likely to appear without adequate date context.

The deduplication problem is not unique to Leeds. Birmingham City Council undertook a similar audit of its planning image library in 2023 after a judicial review highlighted inconsistencies in the photographic evidence attached to a listed building consent decision. What distinguishes Leeds is the scale of the Leodis archive integration — one of the largest municipal photographic collections in northern England — and the speed at which the Digital Transformation Programme is pushing towards a single unified platform before the underlying data has been fully cleaned.

Whether the October deadline holds will depend, in part, on how many records the automated matching flags for manual review. The council has not publicly committed to a figure for how many duplicates it expects to remove.