My fibre went down overnight suddenly. Called BT and an engineer was assigned. I was told that if he found the fault was damage caused by me I would have to pay. I then checked the fibre cable running on the side of my house . When the cable went around the corner the brick has a sharp edge and the outer cable insulation has split in 2. The centre core is still intact. When the engineer visited he found the fault to be with the main box the cable is plugged into. When my homehub updated it couldn’t cope and needed replacing. The cable is still in the same condition but everything is working fine. I asked about the cable and the engineer advised me to leave it as if I asked for it to be replaced I would probably be charged. Seems a bit harsh as no one has been near the cable since it was installed. It was run to coincide with my existing sky cables. These were there years before the fibre cable. How can I be certain I won’t get charged and is it worth getting the cable repaired before I lose my connection.