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Two pedestrians seriously injured as scaffolding topples onto London high street

Published July 11, 2026 · Updated July 11, 2026 · By Susan Jones

Scaffold Tower Collapse on Putney High Street Results in Serious Injuries and Financial Penalties

Two pedestrians seriously injured as scaffolding - A London-based construction firm and its managing director have faced significant financial consequences after a mobile scaffolding structure collapsed onto pedestrians on one of the capital's busiest thoroughfares. The incident, which occurred on Putney High Street, left two members of the public with serious injuries after the tower toppled during windy weather conditions. The Health and Safety Executive (HSE) conducted a thorough investigation into the circumstances surrounding the accident, which took place on July 19, 2023. Their findings revealed that the mobile tower, which had been erected by workers employed by Add Prop Limited, suffered from multiple construction defects. Most notably, the structure was covered in protective sheeting that had not been properly secured.

According to investigators, the sheeting functioned like a sail during periods of strong wind, creating enough force to cause the entire tower to overturn. The collapse trapped two individuals who happened to be walking along the high street at the time, resulting in serious injuries to both victims. The timing of the incident on a busy commercial street meant that the consequences were particularly severe.

Corporate and Individual Responsibility

At the time of the incident, Add Prop Limited was operating as the principal contractor on a significant development project. The company was responsible for converting a commercial building into residential flats, a substantial undertaking that required careful management of safety protocols. Atif Riaz, who served as the sole director of the company, was present on-site in multiple capacities. He was simultaneously acting as both the project manager and the site supervisor on the day the accident occurred.

The HSE's investigation uncovered several critical failures in the company's approach to scaffold safety. One of the primary issues identified was the failure to ensure that the temporary structure had been appropriately designed, installed, and maintained to withstand foreseeable loads. Wind was specifically identified as a potential hazard that should have been accounted for in the construction and securing of the tower.

Compounding the seriousness of the situation, investigators discovered that Add Prop Limited had previously received a Prohibition Notice concerning unsafe work practices involving a tower scaffold at a different location. This prior warning should have alerted the company to potential vulnerabilities in their approach to temporary structures.

Legal Proceedings and Penalties

Following the investigation, the case was brought before Westminster Magistrates' Court, where both the company and Mr. Riaz faced charges related to health and safety violations. The court found Add Prop Limited guilty of breaching Regulation 19(2)(a) of the Construction (Design and Management) Regulations 2015, a key piece of legislation governing construction safety standards.

The financial penalties imposed were substantial. Add Prop Limited was ordered to pay a fine of £20,000, along with an additional £7,000 in legal costs. Mr. Riaz, who was found to have been negligent in his dual role as both sole director and project manager, was fined £1,730 and ordered to pay the same amount in costs.

"The public have a right to expect scaffolding they pass by is safe and has been properly installed – yet every year people are injured when scaffold towers overturn," said HSE Inspector Daniel Burton, who led the investigation.

"In this case, two members of the public suffered serious injuries when a scaffold tower overturned on a busy high street. The risks associated with scaffold towers and wind loading are well known within the construction industry – this kind of incident simply should not happen."

"The fines imposed on Add Prop Limited and Atif Riaz should underline to everyone in the construction industry that the courts, and HSE, take failures to follow health and safety requirements extremely seriously."

"HSE will not hesitate to take action against companies and, where appropriate, directors who fail to do all that they should to keep workers and members of the public safe."

Broader Industry Implications

This case serves as a significant reminder of the ongoing risks associated with temporary structures in urban environments. Scaffold towers are a common sight across London and other major cities, and their proper installation and maintenance are essential for protecting both construction workers and the general public. Wind loading, in particular, represents a well-documented hazard that requires careful consideration during the design and erection of scaffolding systems.

The HSE's decision to pursue both the company and its director individually demonstrates a commitment to holding all levels of responsibility accountable. When directors are actively involved in project management and site supervision, as Mr. Riaz was in this instance, they cannot simply delegate safety concerns to others. Their personal involvement in operations means they bear direct responsibility for ensuring that proper procedures are followed.

The incident also highlights the importance of learning from previous warnings and enforcement actions. The fact that Add Prop Limited had already received a Prohibition Notice for a similar issue at another site suggests that systemic problems may have existed within the company's approach to scaffold safety. This prior notice should have prompted a more thorough review of their practices, yet the same fundamental errors led to another serious incident.

For pedestrians navigating London's busy high streets, the incident underscores the importance of construction companies maintaining rigorous safety standards. While scaffolding is often necessary for building maintenance and development projects, the potential for accidents remains significant when proper precautions are not taken. The combination of inadequate securing methods, failure to account for weather conditions, and insufficient oversight created a situation where serious injury was almost inevitable.

The financial penalties imposed in this case, while substantial, represent only one aspect of the consequences faced by the company and its director. Beyond the monetary costs, there is the reputational damage and the knowledge that their actions directly contributed to serious harm being inflicted on innocent members of the public. The HSE's continued vigilance in monitoring construction safety practices ensures that such incidents are not only addressed when they occur but are prevented through proactive enforcement and education within the industry.