Six fire engines and 35 firefighters and officers dealt with a fire in an office block on Fenchurch Street in Aldgate.
An electrical substation in the basement of the property was damaged by the fire. Firefighters arrived on scene and made the premises safe before putting out the fire once the electrical supply had been isolated.
Thankfully no injuries were reported.
The Brigade was called at 2316 and the fire was under control by 0525. Fire crews from Whitechapel, Shoreditch, Dockhead, Soho, Old Kent Road and Lambeth fire stations attended the scene. The cause of the fire is under investigation.