Detectives are appealing for information and witnesses following an arson at a former hairdressers in North Cheam.
They have also released a CCTV image of a man they wish to speak with, and ask that anyone who recognises him contact investigating officers.
Police were called at 5pm on Saturday, 7 September to reports of a fire on Cheam Common Road.
Officers, the London Fire Brigade (LFB) and the London Ambulance Service attended.
A number of neighbouring buildings were evacuated as a precaution.
The disused shop and the empty flat above were severely damaged by the fire. Fortunately, no one was injured.
The fire is being treated as suspicious.
A review of local CCTV cameras captured an unknown man walking into an alleyway close to the shop at 4:33pm.
Officers are keen to identify this man and speak with him to establish what he was doing in the area.
Anyone who recognises him is asked to call police at Bromley police station via 101 quoting reference Cad 5323/07Sep.
There have been no arrests and enquiries continue.