One ADSL account 1.5km from Exchange is getting 1.03megaBYTE per second downloads from Akamai, and 10Mbit Speedtest.net results all over the country. :)
Another one is 800m away from Exchange and gets only 5Mbit on Speedtest.net (700Kbps up). :(

I just noticed this yesterday morning - did it happen then, or was it much earlier?
Yesterday, all 3 ADSL connections that I look after in Hastings went down at some point (different times).

Reboot your modems folks.
Reboot your folks modems.