Duplicate Image Replacement: What Officials, Experts and Key figures Are Say About London's Growing Digital Records Crisis

London's public sector is sitting on a digital storage problem that officials, archivists and technology specialists say has been quietly compounding for years. Duplicate images — redundant scans, copied records, mirrored files stored across incompatible systems — are clogging databases at councils, NHS trusts and cultural institutions across the capital, inflating costs and, in some cases, creating genuine risks when the wrong version of a record is retrieved and acted upon.

The issue has gained fresh urgency in 2026 as the Starmer government's public sector efficiency drive pushes local authorities to audit and consolidate their digital holdings. NHS England's operational guidance, updated in January 2026, explicitly requires integrated care boards to reduce redundant imaging storage by 20 percent before the end of the financial year. For London, where dozens of NHS trusts operate semi-independently across 32 boroughs, that target is proving harder to hit than anywhere else in the country.

Who Is Raising the Alarm

At Barts Health NHS Trust, which operates across sites including the Royal London Hospital in Whitechapel and St Bartholomew's near Smithfield, radiology administrators have described the duplicate imaging problem as systemic. The trust's PACS — Picture Archiving and Communication System — holds patient imaging going back more than a decade, and data governance specialists working with the trust have noted that migration from legacy systems during the pandemic created layers of duplicated files that have never been formally reconciled. No official figure for the scale of duplication at Barts has been published, but the trust was among those flagged in a NHS England digital infrastructure review circulated to integrated care boards in March 2026.

Hackney Council's digital transformation team has been more vocal. The council launched a formal duplicate asset review in February 2026 covering its planning portal, which holds scanned architectural drawings, site photographs and officer reports stretching back to the 1990s. Planners working on applications in Dalston and along the Lea Valley corridor have reported retrieving outdated imagery that did not reflect recent site changes — a problem that slows down decision-making on an already stretched planning desk. The council has not yet published the results of that review.

The Museum of London Archaeology — MOLA — which maintains one of the largest archaeological image archives in the country after decades of excavation work across the City and Southwark, flagged the issue in its 2025 annual report. The organisation described managing more than 4 million site photographs and noted that automated deduplication tools had identified significant volumes of near-identical images that required human review before deletion. MOLA specialists have argued publicly that indiscriminate deletion is itself a risk, since images that look identical may carry different metadata or contextual value.

The Cost and the Fix

Storage is not cheap. Commercial cloud pricing for public sector contracts in the UK runs broadly between £18 and £40 per terabyte per month depending on the provider and compliance tier, and analysts at the Public Accounts Committee have previously noted that the NHS as a whole spends hundreds of millions annually on digital storage contracts. Reducing duplicate image volumes by even 15 percent across a large trust can translate into six-figure annual savings — money that NHS finance directors are acutely aware of as waiting lists remain stubbornly long.

The technical fix is not simple. Deduplication software can identify exact copies automatically, but near-duplicate images — slightly different crops, brightness-adjusted scans, files saved at different resolutions — require either trained human review or more sophisticated AI-assisted tools. Several London councils are in procurement conversations with suppliers offering AI-backed image matching, though Lambeth and Tower Hamlets are understood to be among those still in early-stage assessment rather than active deployment.

For Londoners, the immediate practical advice from data governance professionals is straightforward: if you are engaging with a council planning application, an NHS referral, or a freedom of information request that involves imagery or scanned documents, request confirmation of which version of a file is the designated master record. That question alone, specialists say, can surface the problem faster than any internal audit. The GLA's digital standards unit has said it expects to publish updated guidance for London boroughs on image record management before the end of September 2026.