>> Tiscali Available 25.07.07
I think weve just found out what your problem is - Tiscali "upgraded" ie installed LLU kit in your exchange a couple of months ago.. and they have probably very recently moved your line over to the LLU service.
There are some lines that work well on rate adaptive services - but there are some that dont - particulary the longer lines.
This bit here
Fixed ADSL: 512 kbps (0.5 Mb)
DSL Max : 250 kbps (0.3 Mb)
shows that BT doesnt think your line will perform well on rate adaption and you would be better with a fixed 512 kb connection - which is the max that your line will support. My own ISP and a few others wont put such long lines on a rate adaptive service for the reasons that you are now seeing.
>> On contacting tiscali they said to check for spyware and virues on the computer just to make sure nothing was slowing it down my end and all is good on the computer.
Rubbish Im afraid - those checks will not make any difference to the speed you are syncing to the exchange at.. There are some things you can try and do and thats following the tips on my lowSNR page.
>> Now is this BT capping the line or tiscali just being poor
Looks like this is nothing to do with the BT side of things now - since its looking more and more like you have been LLU'd and its tiscali's kit that has control over your line.
If you can do this
Tiscali LLU test then you know for sure what is causing your problems.
Let me know what the test says please.
(Sorry for so many questions - but Im wanting to make sure of my facts before giving advice.)