BT Line Fault or My Fault?

Question

Hello,
This morning I was browsing the internet, and my internet suddenly disconnected so I went to make a phonecall to my provider but noticed we had no dial tone on the wireless phones (wireless phones attached to extension socket) so I was unable to make a phone call I decided to check the mian telephone (main telephone connected to main socket downstairs) this had no dial tone as well, and just about as I was going to hang the phone up I heard a dial tone on the main telephone so I checked the wireless phones which was also getting a dial tone. I contacted BT, and they came back telling me they found not faults when they ran the line test so I just left it thinking ok it might be a one off. 
This afternoon I was browsing the internet, and my internet suddenly disconnected so I checked the wireless phones, and once again it had no dial tone but this time I never checked the dial tone on the main phone as I presumd it would have no dial tone either. I called BT again, and once again they said there was no faults but I am thinking well if my phones are working absolutely fine now - its not going to show a fault is it - the man told me to plug the main telephone into the master socket - when I removed the faceplate this caused my wireless telephone to disconnect which I have just been told is normal that if the main socket faceplate is removed it will disconnect the extension socket as well.
I am thinking because both telephone sockets go down at the same time, and I have two seperate phones one wired attached to the main socket and one wireless attached to the extension socket something is wrong with the main socket which is causing issues for the extension socket. 

Answer 1

Do you pay BT for your line rental and calls?
If you are using another ISP, then its possible that they were doing some work on their equipment in the exchange, which would have resulted in your phone being disconnected.
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.