SIMON PELOSI AND OTHERS AGAINST LANARKSHIRE HOUSING ASSOCIATION LTD

Factual and Procedural Background

Thirty-six actions were initiated by individuals (the Pursuers) against Lanarkshire Housing Association Ltd (the Defender), the landlord of a housing development known as the Watling Street development in Motherwell. The claims allege personal injury caused by contaminants present in the land of the development. This opinion addresses eleven of those actions heard together, with the outcome binding on the remaining cases. The central issues are whether the Defender breached statutory duties and if such breach caused loss to the Pursuers.

The cases originated in early 2013 and underwent several procedural delays, including periods of sisting and multiple case management hearings. Extensive evidence was gathered over many years, including medical records, expert reports, and indoor air assessments. A proof hearing was held over nearly three weeks, during which evidence from thirteen Pursuers and six experts was led.

The Watling Street development was constructed on a former industrial site, subdivided into four plots, with the properties relevant to the Pursuers located in Plot A. The site had a history of industrial use involving metal works and engineering manufacturing until the late 1970s, followed by redevelopment for residential use commencing in the late 1990s. Investigations in the 1990s and early 2000s identified various contaminants in soil and groundwater, with some hotspot areas detected. Residents became aware of potential contamination concerns around 2009-2010, leading to further investigations by environmental consultants.

The contaminants identified included a range of metals, volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), polycyclic aromatic hydrocarbons (PAHs), and other chemicals with potential to evaporate and cause exposure through inhalation or dermal contact. The Defender owns ninety-four properties on the site, with an estimated 200 residents, thirteen of whom gave evidence.

Legal Issues Presented

1. Whether the Defender breached its statutory duties under the Housing (Scotland) Acts 1987 and 2001 by failing to ensure the properties were reasonably fit for human habitation at the commencement and throughout the tenancy.
2. If such breach occurred, whether it caused loss or damage to the Pursuers.

Arguments of the Parties

Pursuers' Arguments

• The extent of contamination at individual properties is not fully known, but contaminants have been present since tenancy commencement.
• Investigations by WSP were insufficient in methodology and sampling depth, failing to fully identify contamination hotspots or groundwater conditions.
• There is a significant potential risk from vapour inhalation and direct contact with contaminants, with undiscovered hotspots likely to exist.
• Modelling by Mr Quint was more appropriate and indicated health risks, although limited by data and assumptions.
• Pursuers reported consistent symptoms and health deterioration correlated with occupancy, including headaches, lethargy, inflammation, joint pain, and rashes linked to soil contact.
• Professor Douglas’s toxicology evidence supports causation of harm from contaminants and exposure pathways, preferring this to the Defender’s expert evidence.
• The risk of increased cancer incidence, even without current cancer cases, suffices for damages due to increased health risk.

Defender's Arguments

• The Pursuers bear the burden to prove actual contamination at individual properties causing harm, which they have not done.
• Part 2A of the Environmental Protection Act 1990 is relevant for assessing contamination, and properties do not meet that threshold for unfitness.
• Environmental expert evidence does not establish that the properties are unfit for habitation or that occupants faced health risks; further investigation may be needed but does not prove harm.
• Modelling by Mr Firth is more reliable and indicates contaminant levels below health-based screening criteria, with minimal or low risk.
• Medical evidence from Professor Eddleston, relying on contemporaneous GP records, does not support that symptoms were caused by contaminants.
• Symptoms reported are common in the general population and may be attributable to other causes, including health anxiety.
• There is no evidence linking cancer cases to site contamination, and theoretical increased cancer risk does not establish breach or liability.
• The Pursuers’ reliance on anecdotal or unsubstantiated medical evidence is insufficient to meet the legal standard of proof.

Table of Precedents Cited

Court's Reasoning and Analysis

The court systematically evaluated the evidence from both environmental and toxicology experts alongside the factual evidence from the Pursuers. It noted the complex history of contamination and the presence of various chemicals and solvents with potential exposure pathways through vapour inhalation and direct contact.

Regarding environmental evidence, the court distinguished between risk thresholds under Part 2A of the Environmental Protection Act 1990 and the statutory test for fitness of habitation under the Housing Acts. It found that the threshold for contaminated land under Part 2A was not determinative of breach of duty but acknowledged the usefulness of the risk categories for context.

The court compared the differing approaches to vapour modelling by the experts. It preferred the Defender’s expert Mr Firth’s use of arithmetic means over the more conservative upper confidence limit approach of Mr Quint, finding that Mr Quint’s method likely overestimated risk. It also found that the environmental evidence did not establish, on balance, that contaminant levels posed a risk sufficient to render the properties unfit for habitation.

The court considered the Pursuers’ argument about hotspots and undiscovered contamination but found no persuasive evidential basis to conclude that undiscovered hotspots existed or that identified hotspots remained unremediated. It accepted the Defender’s expert reasoning that sampling was spatially adequate and that the presence of hotspots was limited.

On toxicology, the court carefully weighed the competing expert evidence. It found that Professor Eddleston’s clinical toxicology evidence, which relied on contemporaneous medical records and literature, was more robust and persuasive than Professor Douglas’s evidence, which was more anecdotal and less supported by scientific literature. The court noted the absence of research on chronic low-level residential exposure and the commonality of symptoms reported by the Pursuers in the general population.

The court also found issues with the reliability of the Pursuers’ evidence, including discrepancies between witness statements and medical records, pre-existing symptoms, and the lack of a control group for comparison. It noted that some symptoms improved after leaving the properties but attributed this at least partly to health anxiety.

The court concluded that the Pursuers failed to prove, on the balance of probabilities, that the Defender breached its statutory duty by providing properties not reasonably fit for human habitation, nor that the contaminants caused the alleged harm. The theoretical increased cancer risk was insufficient to establish breach or liability.

Holding and Implications

The court's final decision is to sustain the Defender's pleas-in-law and pronounce a decree of absolvitor in each of the eleven actions. The Pursuers’ averments are found to be unfounded in fact, and they have not suffered loss, injury, or damage through breach of statutory duty by the Defender.

The direct effect is that all claims are dismissed, with no finding of breach or causation. No new precedent is established beyond the application of existing statutory and case law principles to the facts. The decision confirms the evidential threshold required to prove unfitness for habitation and causation of harm in contamination cases involving residential properties.