The property is a flat. If it was a 2 or 3 bed, it is possible that L shared a bedroom with the 13yr old. I saw photos online (newspaper) showing the front door and it showed the doorbell had been removed. I think it is quite unusual for a doorbell with a camera to be fitted, unless it is an area where there is a high crime rate. I wonder what other reasons there would be for someone specifically fitting one with a camera. Would people who are involved in the use or supply of certain substances fit them to see who is at the door I wonder.