Hi Media 100,
I have quickly checked Sam Knows a great site for checking what is avalible in your local Exchange. Unfortuanetly as other's have said there is only ADSL Max.
You options are therefore limited. The best you can do with ADSL Max from BT is to get onto an ISP who can gaurentee your contention. At Fluidata we cap elements of the ADSL Max to create a product which deliver up to 0.8 Mb/s upload at 5.1 contension. This product is still limited by distance and quality of copper.
What you can the look at is bonding these lines to get upto 1.5 Mb/s. These are not ideal solutions but given the limited services avalible the only other options appears to be fibre.
I would be happy to talk to you about the Fluidata products avalible