The cases are included in the watchdog’s latest learning from severe maladministration report looking at how landlords have responded to windows complaints.

With the important role that social housing has to play in giving safe and secure housing to millions, it is hoped the learning in these reports will help landlords provide effective services that protect this aspiration.

The report comes just a month after the open letter, in which the Ombudsman raised concerns about the approaches of landlords to window repairs following more serious findings in cases investigated by the Ombudsman.

The purpose of letter was to highlight the risks of disrepair in windows where works can often end up being delayed because of costs, given the potential hazards and repeated complaints about the physical and mental impact on residents.

Among the learning was to conduct thorough risk assessments based on individual household circumstances and to justify decisions to defer repairs or opt for limited repairs not primarily on cost but in line with legal obligations.

The report includes cases involving disrepair reports for more than a decade as well as safety concerns being raised by residents about the installation of new windows in taller buildings.

Landlords highlighted in the report include:

• Accent Housing
• Camden Council
• Clarion
• Guinness Partnership
• Haringey Council
• Hammersmith and Fulham Council
• L&Q
• Lambeth Council
• Lewisham Council
• Metropolitan Thames Valley
• Notting Hill Genesis
• Stroud Council
• Tower Hamlets Council

Richard Blakeway, Housing Ombudsman, said: “At the crux of this report are stretched resources.

“Repairing windows can be costly. This can lead to landlords deferring immediate repairs in favour of major works at a later date. But those future works can be volatile and uncertain, leaving residents living with faulty windows for several years. By focusing on the building rather than the individuals living within it, landlords risk overlooking their legal obligations.

“This approach is also normalising delays to key repairs and an increase in complaints about housing conditions. Ultimately, this requires a new and strengthened Decent Homes Standard, and it is welcome the government has committed to one.

“We have compiled learning from some key cases in this report and we will do more on this topic in the coming months. We are also hosting a webinar looking at window complaints, which you can sign up to for free via our Learning Hub.”