It has been a cold start to the year and for many that means the heating's on, windows are shut and we're drying clothes inside the house. For many people, mould becomes a major concern in winter and the health problems mould can cause have been under more scrutiny since the death of two-year-old Awaab Ishak who died in 2020 from long-term exposure to mould at his home in Rochdale.

At Imperial College London a study called WellHome is underway to monitor levels of mould and other indoor pollutants in homes across the west of the capital. Presenter James Gallagher meets Mum of four Roxanne who had monitoring equipment installed in her house to collect data that could lead to guidance on housing quality and inform how healthcare professionals look for and treat conditions affected by mould.

Joining James at Roxanne's is WellHome's Dr Athena Trachalaki, a Respiratory Registrar with Imperial College NHS trust. With her, to go through all the pollutants that pose a risk to our health indoors is WellHome lead and Professor of Community Health and Policy at Imperial College, Frank Kelly.

Dr Jonathan Grigg, Professor of Paediatric Respiratory and Environmental Medicine at Queen Mary University, London, tells James it could be the end of the line for the gas cooker, and Professor Alastair Lewis who is Professor of Atmospheric Chemistry at the University of York takes a virtual tour of James's home to discuss all the ways James could be cleaning up the air he breathes.

Presenter: James Gallagher Producer: Tom Bonnett Editor: Holly Squire

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