Four fire engines and around 25 firefighters were called to a fire at a supermarket on South Road in Southall.
A small part of a single storey supermarket was damaged by fire. There were no reports of any injuries.
The Brigade was called at 0019 and the fire was under control by 0110. Fire crews from Southall, Ealing and Hayes fire stations attended the scene.
The Brigade’s Fire Investigators believe the fire was accidental and involved a commercial fridge freezer.