London Councils Fix Duplicate Images Delaying Dozens of Planning Applications

At least six London boroughs have flagged a systemic duplicate image problem on their digital planning portals this week, with incorrectly matched or repeated photographs causing caseworkers to pause applications and, in some instances, send files back for re-submission. The issue, which first surfaced in bulk around 28 June 2026, has added to backlogs already strained by the government's push to accelerate housing approvals under its Planning and Infrastructure Bill.

The timing is awkward. Keir Starmer's government has staked considerable political capital on speeding up the planning system, and local authorities across London are under pressure from the Ministry of Housing, Communities and Local Government to cut decision times on residential applications. Duplicate or wrongly assigned images — floor plans showing the wrong property, street-level photographs attached to the wrong address file — do not just cause bureaucratic annoyance. They can constitute a material error in a planning record, which means affected applications may need to be publicly re-advertised, adding weeks to already lengthy processes.

Where the Problem Has Emerged

Tower Hamlets and Southwark are among the boroughs where the issue has been most visible this week. Tower Hamlets' planning portal, which handles applications across Bethnal Green, Whitechapel and the Isle of Dogs, showed at least 14 live applications between 30 June and 3 July 2026 where submitted image files appeared to be duplicated from earlier, unrelated cases in the system. Southwark Council's digital team acknowledged this week that it was investigating anomalies in its document management software affecting submissions along the Old Kent Road corridor, one of the most active development zones in the borough.

The Greater London Authority's planning unit at City Hall on the South Bank is also understood to be monitoring the situation, given that several of the affected applications fall within or adjacent to Opportunity Areas designated under the London Plan. The GLA has not yet issued a formal statement, but borough planning officers have been in contact with City Hall's digital infrastructure team, according to council meeting agendas published this week.

The root cause appears to be linked to a software update rolled out in late June to the Planning Portal — the national platform managed by the Planning Portal Ltd on behalf of local authorities across England and Wales. A number of councils outside London, including those in the West Midlands and the North West, have reported similar symptoms, suggesting the problem is not unique to the capital but is hitting London hardest because of application volumes.

What It Means for Applicants

For homeowners and developers, the practical consequences range from minor delay to significant cost. A straightforward householder application in, say, Hackney or Lambeth typically costs £258 in planning fees as of April 2026. If that application is paused, re-advertised and subject to a fresh public consultation window — usually 21 days — the knock-on costs in architect time and project delay can run into the hundreds or low thousands of pounds, depending on the complexity of the scheme.

Larger commercial or residential applications are more exposed. A medium-scale residential development on a site like those being promoted along the Lewisham to Catford regeneration corridor can carry planning fees in the tens of thousands of pounds, and project finance agreements often have milestones tied to permission dates. A three-to-four week slip caused by an administrative image error can trigger penalty clauses or require lenders to be notified.

Architects and planning agents working in the city have been advised by several borough portals to re-check their live submissions this week and confirm that the correct images are associated with the correct property address before any further caseworker action is taken. The Architects Registration Board and the Royal Town Planning Institute have both circulated informal guidance to members this week flagging the problem, though neither has issued a formal public notice as of 4 July 2026.

Planning Portal Ltd has said it is working on a fix, and several London boroughs expect a corrected software version to be deployed before the end of next week. Until then, applicants with time-sensitive submissions are being encouraged to contact their borough's planning department directly — by telephone where possible — rather than relying on automated portal notifications, which may themselves be affected by the underlying image-matching fault.