Station Manager Bruce Grain, from nearby Brixton fire station, is at the scene, he said:
“We were called to reports of a fire and explosion. Firefighters are on the scene at the moment and have managed to bring the fire under control."
"The building has been severely damaged so we are not sure at this stage what the building was being used for. As soon as it’s safe to do so, our fire investigators will be working to establish exactly what happened.”
More top news
A bright and sunny day tomorrow, but feeling distinctly cool and chilly tonight.
An ITV News London investigation has discovered the inquest will now be held at Westminster Coroner's Court.
The family court finalised the adoption as the criminal proceedings were still under way. The couple have vowed to fight for their child.