After a line fault last week my broadband speed dropped from 12 Mbit to 6 Mbit. I called my isp and During The course of the conversation with them it turns out that BT / Openreach seem to think my line has moved more than 40 miles to Windermere. This might explain why I've recenly been offered FTTC as they now think my line is connected to a cabinet rather than directly to the exchange two miles away.
Either that or they had to do one heck of job reconnecting my line.
This must be a fairly recent thing because the line checker was correct earlier this year when I checked to see what was available.
Does this happen often and how to I get it changed? If only to stop being offered a product I can't get. Or should I just go along with it and let them try

My sig is out of date.