Just moved into a new build and got fibre set up. I had a feeling the speed wasn't quite as good as it could be so called Sky. They arranged for an OpenReach engineer who came this morning.
Turned out that it was caused by the internal wiring going from master socket to the various phone line extensions in the property. He disconnected it so only the master socket was active and my speed went up 9mb!
He put a new faceplate in so I can plug router and phone into the active master socket. But I am now left with inactive phone extensions in all other rooms. It doesn't actually bother me much as my phone has a wireless secondary handset which will still work in hallway. No need for phones in the bedrooms.
Just wondering if this was common with new builds? Engineer reckons they didn't use proper BT approved cable. Just some type that apparently works with alarm systems? Seemed thinner.