A man was treated by paramedics and 70 people were evacuated from a block of flats during a chemical incident near Tower Bridge.
Emergency services were called at 10.20am yesterday - February 9 - after the process of mixing chemicals for a swimming pool in the basement of a block of flats went wrong.
About 25 firefighters carried out a sweep of the mixed-use commercial and residential block in Tower Brigade Road where they found "elevated readings of chemical substances".
Crews evacuated about 70 people from the building and set up a 50-metre cordon as a precaution.
The incident lasted for nearly five hours, during which firefighters used specialist equipment to contain a chemical spill and ventilated the property.
One man was treated at the scene by London Ambulance Service (LAS) crews.
A LAS spokesperson would not confirm what he was treated for.
A London Fire Brigade spokesperson said gloves should always be worn when using cleaning products and that instructions for cleaning products and chemicals should always be followed carefully.
They added: "Don’t be tempted to mix them as it could produce hazardous fumes.
“Always keep them securely sealed and out of the reach of children.”
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