Four fire engines and 21 firefighters and officers were called to a fire at a builder's yard in Gravel Road in Bromley this morning.
A one-storey workshop was damaged by fire. One caravan and an outbuilding were destroyed by fire.
A 15kg propane cylinder, a 5kg propane cylinder and a 5kg oxygen cylinder were cooled to an ambient temperature.
The Brigade was called at 0345 and the fire was under control at 0623. Fire crews from Orpington, Biggin Hill and Addington fire stations attended the scene.
The cause of the fire is under investigation.