A Fire in two flats at Surrey Towers on Saturday morning was caused by a cigarette, an investigating officer has confirmed.
Derrick Chegwin said the butt had been left in an ash tray on a balcony outside a flat and had caught fire and spread to the property next door.
Both apartments were heavily smoke damaged and there was fire damage to the lounge in the flat where the fire started.
Mr Chegwin, station manager at Farnham Fire Station, said the occupants were out when the fire started but around 60 other residents were evacuated for two hours.
He recorded the blaze as accidental and reminded people to fully stub out cigarettes.
