Lucky for you having wine, I'm on call and canna touch a drop
OK, its a 5 year old house and its been working perfectly for at least 3 of those years.
2 phone sockets in lounge which would have the phone and sky in them, but they are unplugged at the wall. It doesn't affect the problem if they are in though anyway.
1 socket in the small bedroom/office, I normally have an extension going to my router from this one, buts it empty.
1 NTE in hall way where the extension lead is currently heading up the stairs to my router.
Basically its a virgin set up at the mo, only the router is connected.
Its not a problem with the filter or extension, they are perfectly OK.