BT’s internet speed tester
BT has its own internet speed tester. But you need to be on BT MaxDSL service before using this tester. You can check what service you are one by contacting your ISP.
http://www.speedtester.bt.com/
here is how to use it: http://www.plus.net/support/broadband/troubleshooting/bt_speed_tester.shtml
Another interesting option available to everyone:
http://www.thinkbroadband.com/speedtest
