Ummm. I'd like photos of the outside and inside of the socket you are using. (Upload them somewhere and post a link is how it's done).

It's possible that the windowsill socket is still the master but fitted with an NTE5B faceplate, or if it's an older type just a blanking plate. If it is then there is nothing to stop you having the wire between the sockets replaced by anyone competent.

If where you currently have the router is the one and only socket, then yes, they shouldn't be touching that cable.

Unless it is an extension from the "master socket" on the windowsill, rather than a replacement.

Where the router plugs in is certainly not an extension from a master socket on the window sill. There was a master socket once on the window sill, but there isn't any more.

If you look at the photos posted, it is clear that this is where the external telephone line comes in and there is no socket on that box attached to it. The white covered cable carries the line out through the bottom, along the skirting board and to the current master socket location.

As several others have said, all the wiring between where the cable comes into the house in the box on the window sill and the master socket is BT's to repair.

Edited by caffn8me (Tue 19-Jan-16 00:56:39)

I forgot the 5 December pic, was thinking we had only had the recent diagram.

Yeah, that certainly answers my question.

Well yes, it's not entirely clear from his posts or diagram is it.

Up to and including the Master Socket is BT's responsibility. Call them and get them to sort it out. It should be free or a nominal fee as it should be an half hour job.

You could do it yourself as it is a fairly easy job but you would be infringing on someone else's property.

Hi

Thank You, that is what I thought as well, appreciated. Also thank you all who have contributed to this post, I appreciate you all for your time.

Kev