Around 12 residents living in flats above offices on Tooley Street, SE1 fled a fire that broke out in a basement car park yesterday evening.
A baby boy suffered the effects of smoke inhalation and was taken to hospital by London Ambulance Service Crews.
A small part of the basement car park was damaged by the fire.
Four fire engines and around 20 firefighters from Old Kent Road and Southwark fire stations were at the scene
The Brigade was called at 2232 and the fire was under control by 0045.
The cause of the fire is under investigation.