The fire started around 00:50 BST (UTC+1), when a fridge caught fire in flat 16 on 4th floor. Firefighters arrived around 1am, and put out the fire in the flat within minutes. When the crew were leaving the building, they spotted flames rising up the outside of the building. Images later presented to the Grenfell Tower Inquiry suggested that the fire may have reached the outside before the firefighters had begun to tackle the initial fire in flat 16. The flames spread up the side at a "terrifying rate", By 01:29, a rising column of flames had reached the roof and the fire was out of control.