llu is adsl
llu is simply unbundled adsl I think it stands for local loop unbundling but not sure. Typically an isp like ukonline or be who are unbundled have much lower traffic costs as they dont have to pay for expensive bt centrals and in addition they use their own dslam equipment so can offer adsl2+ services, in addition they are also not subject to bras automatic profiling so synch speed is the speed you get. Not all llu isps rock of course, tiscali who utilise llu decide to take advantage of the lower costs by cramming customers in and charge them minimal prices so the contention ratio is too high.