Around 20 firefighters were called to the accidental spillage of a cleaning agent at a hotel on Kensington Court this afternoon.
Crews checked the area for raised chemical levels. Fifty people were evacuated from the hotel before the Brigade arrived. The Brigade evacuated a further 30 people from an adjacent apartment as a precaution.
Three fire engines from North Kensington, Hammersmith and Chelsea fire stations and a fire rescue unit from Euston fire station were at the scene.
The Brigade was called at 1217 and the incident was over by 1740.