Yes its Talktalk pulling the plug or doing something dubious their end. Same thing has happened to me loads of times since I switched to TT two years ago - I was kept hanging on the help line for about half an hour while they talk you through all the tests to see why the connection isn't working ans are SO patronising. They then give you a "second level" helpline number (in other words they wash their hands of you!) when you ring that second level help line- they ALWAYS say its your router or your filter or your password causing it (never is) This time last year they said they were convinced it was my router so sent me a new one, they messed about with my password so many times, I got very very angry as I missed bids on Ebay so I threw a complete wobbly, told them I was going back to BT, asked to speak to a manager and lo and behold .......... suddenly my connection came back as if by magic!!! Believe you me - its them!! Threaten them with leaving Talk Talk, demand a discount on your monthly fees, ask to speak to a manager ....and I guarantee your problem will soon be solved!