The fire service says: “Ten fire engines and around 70 firefighters have been called to a building fire on High Street in Beckenham.
“The fire is producing a significant amount of smoke and we are advising people in the area to keep their windows and doors closed at this time.
“The incident is causing major traffic disruption in Beckenham and we are asking people to avoid travelling through the area whilst the incident remains ongoing as road closures are in place.
“The Brigade received the first of 18 calls at 0759 and Control Officers have mobilised crews from Beckenham, Bromley, Woodside, Forest Hill and surrounding fire stations to the scene. A 32-metre turntable ladder from Forest Hill is also attending. The cause of the fire is unknown at this time.”