How Liverpool's Planning Files Ended Up Full of the Same Photo: The Story Behind the Duplicate Image Problem

Liverpool City Council's planning portal contains thousands of duplicate images — the same streetscape photograph filed under multiple application numbers, the same artist's impression recycled across unrelated development proposals — and untangling that mess has become one of the quieter administrative headaches facing the authority's digital services team heading into the second half of 2026.

The problem matters now because the council is midway through a £2.1 million overhaul of its planning data infrastructure, a project that began in January 2025 and is scheduled to complete by March 2027. Duplicate imagery doesn't just clog storage — it creates genuine confusion for residents researching applications, for ward councillors scrutinising proposals, and for planning officers trying to establish accurate visual records of how a site looked before work began. When the same stock photograph of, say, the junction of Vauxhall Road and Great Howard Street appears attached to four separate applications spanning six years, the evidentiary value of that image collapses entirely.

How the Files Got This Way

The roots of the problem run back to roughly 2012 and 2013, when Liverpool — like most English local authorities — was pushing hard to move paper planning files onto digital systems. The government's Planning Portal, administered nationally, had expanded its upload capacity, and councils were encouraged to digitise backlogs fast. Liverpool's planning department was processing well over 3,000 applications a year at that point, and the teams handling document uploads were under pressure to keep pace.

The shortcuts taken then were not unique to Liverpool. Applicants' agents would submit a single photograph of a neighbourhood — a shot of the Georgian terraces on Falkner Street in Toxteth, for instance, or a wide-angle view looking down Dale Street toward the Municipal Buildings — and that image would get re-used across multiple submissions from the same firm. Planning officers, stretched thin, logged what arrived rather than auditing it. Merseyside Civic Society raised concerns about photographic record quality as far back as 2016, though the digitisation problem specifically was not among their headline issues at that time.

The scale became clearer only when Liverpool City Council commissioned an internal data audit in late 2023, as part of its preparation for the infrastructure upgrade. That audit, referenced in a cabinet report published in February 2024, identified more than 14,000 image files flagged as probable duplicates within the planning system — a figure covering submissions dating from 2009 onwards. The council said at the time that de-duplication was among the remediation tasks to be built into the 2025-2027 project scope.

What the Remediation Actually Involves

Fixing the problem is not simply a matter of deleting repeat files. Planning records carry legal weight. An image attached to a live or recently decided application cannot be removed without a formal amendment process, and in cases where a duplicate is the only surviving photograph of a site's pre-development condition — particularly relevant in areas like the Baltic Triangle and the northern docklands, where change has been rapid — officers have to verify what, if anything, can stand in its place before anything is pulled from the record.

The council's digital services team is using automated image-matching software to flag likely duplicates, which are then reviewed manually before any action is taken. Liverpool John Moores University's School of Computer Science and Mathematics has been involved in an advisory capacity on the matching algorithm, though the bulk of the review work sits with council staff. Roughly 4,200 files had been resolved as of the end of the first quarter of 2026, according to a progress note circulated to the planning committee in April.

For residents and developers, the practical advice is straightforward: if you are researching a planning application on Liverpool's public portal and the site photographs look generic or inconsistent with the address listed, flag it directly to the planning department's document management team rather than treating the images as reliable evidence. Applications decided after January 2025 are subject to the new submission standards, which require agents to include GPS-tagged photographs and a signed declaration that images are site-specific. Older files will continue to be cleaned up progressively through to the project's March 2027 end date — but for now, the historical record remains a work in progress.