I live a fair way from the exchange (not sure how far exactly but maybe 3-4km), and as I'm trying to squeeze as much speed as I can out of the line I purchased a Billion BiPAC 7800DXL based on the recommendations on the increasebroadbandspeed.co.uk site.
Interestingly, it reports that a speed of 9344 is attainable even though it always connects at 2424 (and I mean always!). I thought this meant there could be a cap on the line, but after contacting my ISP they tell me this is not the case... I have pasted the full stats below, so if someone could take a look and see if these numbers makes sense and if I should be getting a higher speed it would be greatly appreciated!
Traffic Type: ATM
Link Power State: L0
Downstream / Upstream
Line Coding (Trellis): On / On
SNR Margin (dB): 7.3 / 6.9
Attenuation (dB): 37.0 / 19.9
Output Power (dBm): 19.1 / 12.1
Attainable Rate (Kbps): 9348 / 1153
Rate (Kbps): 2424 / 1017