The fire service is investigating the cause of a huge blaze that ripped through a business founded almost 100 years ago. Crews have finally left the scene after 31 hours of tirelessly tackling the flames and billowing smoke at K Laundry Ltd, in Northwood Road, Ramsgate. At the height of the inferno, there were 12 fire engines at the scene of the blaze, which started shortly after 4am yesterday. Operations were scaled back and crews finally left the scene shortly after 11am today. People as far away as Deal reported seeing black smoke billowing from the industrial building. Residents in the are…