Dust from worn-out brake pads could have the same harmful impact as diesel emissions, according to scientists.

Tests carried out by King’s College London, show metallic abrasion dust can cause inflammation of the lungs and reduce immunity, increasing the risk of respiratory infections.

Scientists said the metal particles could be contributing to serious illnesses like pneumonia or bronchitis.

They added brake dust could be behind a condition known as “London throat”.

Sufferers experience intermittent bouts of runny noses, and the low-level illness can lead to more serious infections.

The scientists found that vanadium, a metal present in both brake dust and diesel exhaust fumes, might be responsible for harmful effects on immune cells.

Macrophages – the lungs’ front-line defence system which kill bacteria by engulfing and digesting them – were

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