Chix, all the speedtest.net results you've posted are dated 24/9/2007 at 10.45am, can you run a new one with a direct plug into the main BT linebox with nothing else plugged in....not even in any exte ...
Test1 comprises of Best Effort Test: -provides background information.
IP profile for your line is - 500 kbps
DSL connection rate: 448 kbps(UP-STREAM) 576 kb ...
Chix, that's more likely to be ADSL Max profile related than actually down to Orange. Run a BT speedtest, if your IP Profile shows as low and the downstream rate (not the speed result) shows high then ...