Huge plumes of black smoke can be seen coming from a fire in Woolwich.
According to a London Fire Brigade spokesman a diesel compressor is "100% alight" at the yard in Arsenal Way.
Station Manager Joe Kenny who was at the fire said: “The compressor was in an open area on the first floor, close to an unfinished section of the building. If firefighters hadn’t acted fast it could have spread very quickly along exposed timbers and into the building under construction, but thankfully it was brought under control at an early stage.”
The fire is at the Royal Arsenal residential development, where thousands of new homes are being built.
The cause of the fire is under investigation.