Okay so I did that and I still get buzzing on the phone on a quiet line test when connected to the test socket. I also had a second unused landline phone lying around and tested by connecting that, faint buzzing is still present on the test line.
I also asked my mother about the second socket, turns out it has nothing to do with the BT line and was something to do with some cable TV the previous owners of the house had. When BT connected to the house they told my mother to only use the master socket. So we only have one BT socket in the house.
Its quite possible that the buzzing is causing errors on the line, which may be affecting your broadband performance.
Personally, I think the best course of action, would be to get the line checked by one of the BT moderators. They can test for line faults and monitor the overall performance including any error counts.
If they find a line fault, then they will pass it to Openreach.
They are quite busy at the moment, so it may be a few days before they can look at it, but they will take ownership, and keep you informed.
I have asked a moderator to provide assistance, they will post an invite on this thread.
They are the only BT employees on this forum, and are based in the UK.
I've ran a couple of line tests this morning testing specifically for a noisy line. We can't find any issues with it. Can you please review the following page: Engineer Home Improvement Service. That page will tell you when we charge for engineer visits. Also, go to this page Check your wiring and set-up - single socket and carry out the self help checks as they should also help prevent and charges being raised should we need to send an engineer about the noise on the line.
Also, do you still get noise on the line if you only have the phone plugged into the test socket without the Home Hub connected?
I still get noise with only the phone plugged into the test socket without the Home Hub connected.
Thank you @Taker44,
The engineer that I will be booking is only going out to test your line for the noise. They won't be there for anything related to the broadband service. I can book an engineer appointment for you. It’s free of charge if the problem is with our network. But if the engineer finds the problem is with your home wiring, your equipment, or our network has been damaged within the boundary of your property, you'll be charged £85 on your next bill. Before I can send an engineer out I need to speak with the account holder and confirm that they're happy for me to send one. Can you let me know a good time for me to call and speak with them?
My main issue is with my broadband though. If the engineer won't fix that then what would be the point of a visit? Is there no way for the engineer to fix that?
Noise on the line causes errors on the broadband which can cause the issue you are getting.
The only way to prove this, is to get the noise fault fixed, then see if the problem is still there.
The account holder will be free for a call tomorrow any time after 2pm.