Coventry Council's Digital Archives Hit by Duplicate Image Crisis — Here's What Changed This Week

Coventry City Council launched an emergency review of its digital planning and heritage archive this week after staff identified hundreds of duplicate images clogging the public-facing portal used by residents, developers and architectural historians across the city. The problem, which had been building since the council migrated its records system in spring 2024, reached a tipping point on Monday 30 June when the Planning and Building Control team flagged that searches were returning duplicate photographs for at least 340 listed-building applications submitted since January 2025.

The timing matters. Coventry is in the middle of a significant wave of planning activity. Development pressure around the Friargate business district, the ongoing regeneration of the Canal Basin quarter, and a cluster of new student-housing applications near the Gosford Street corridor mean the planning portal is handling record query volumes. When images duplicate — sometimes four or five versions of the same photograph appearing under different file references — caseworkers and members of the public cannot easily confirm which version is the authoritative record. That creates real risks for decisions involving listed structures, conservation areas and enforcement cases.

What Triggered the Audit

The immediate cause appears to be a batch-upload error in the council's Idox Uniform document management system, the platform used by most English local authorities to handle planning submissions. When applicants submit documents through the online portal, images are automatically assigned reference numbers. A configuration fault meant that between November 2024 and May 2026 — a period of roughly 18 months — certain JPEG and PNG files were being indexed twice on upload, generating ghost copies that cluttered search results without any indication to the user that duplicates existed.

Coventry's Digital Services team confirmed this week that the audit would cover approximately 1,200 planning applications lodged during that window. Staff from the council's Historic Environment team, based at the Lunt Roman Fort site in Baginton, have also been asked to cross-check photographic records held in the Coventry History Centre on Mandela Avenue, where physical and digital archives overlap. The council has not yet published a timeline for completing the work, though internal communications seen by The Daily Coventry indicate a target of completing the first phase — identifying and flagging all confirmed duplicates — before the end of July 2026.

Duplicate image problems in public records are not trivial. Planning decisions can be challenged at appeal, and the integrity of the documentary record matters in those proceedings. English Heritage guidance published in 2022 specifies that photographic evidence submitted with listed-building consent applications must be uniquely identifiable and traceable to a specific date and author. Where duplicates exist without clear provenance metadata, that standard is harder to meet.

Practical Impact for Residents and Developers

For anyone currently tracking a planning application — whether a homeowner on Earlsdon Avenue North seeking approval for an extension, or a developer working on one of the larger schemes around the Belgrade Plaza area — the council is advising that searches conducted through the public planning portal this week may return incomplete or confusing image sets. Users are being directed to contact the Planning department directly by telephone or email if they need to verify a specific document.

The council's Development Management team is operating a temporary workaround: caseworkers are manually annotating affected applications with a note indicating that photographic records are under review. The annotation system went live on Wednesday 2 July. No planning decisions involving affected applications are being issued until the relevant images have been verified, which the council says may delay some decisions by up to three weeks.

The Coventry and Warwickshire Chamber of Commerce, which represents many of the developers and businesses that regularly use the planning portal, has been briefed on the issue. The audit is expected to cost the council between £15,000 and £20,000 in staff time and any necessary system remediation work, according to figures discussed internally. Residents who submitted planning documents containing photographs between November 2024 and May 2026 and want confirmation that their records are unaffected can request a manual check by contacting the Planning and Building Control team at the council's offices on Earl Street.