Hi Galaxy Guy. Thanks for the reply. Yes it’s in Beldon screened twisted pair. Unfortunately multiple busses. No Comms device (good old fashioned Redcare) and all look good in diagnostics. However, could dip, as mentioned it can sit fine for days. Even weeks sometimes. Think induced voltage is the best path to take. They did have instances of the AC passing 250vAC. Which I originally put the faults down to. However UKPN have monitored now and has been clear for some time, apparently.