hmm - those reports on there do seem a bit dismal.
Although Ive never personally used UKO myself..
... I have spoken to their CS in the past in respect of other matters.. and Ive been pretty impressed that their staff knew what they were talking about and I wasnt fobbed off or the staff come over "glassy eyed" because they didnt have a clue what I was asking/telling them.
TBH I almost went with them myself too, but I later found out that Be was on its way - so theres no way I could have passed up the opportunity of getting a 24Mb connection since Ive got a very short line.
Ive seen reports about UKO from customers on various other sites and the general consensus seems to be that their LLU service is good. I think there was a patch when there was a bit of a stink about some of their IPStream lines being throttled at one point, but AFAIK the LLU is fine.
Rizla one of the regs on here who is a seasoned adsler, uses UKO. He's been with many ISPs in the past (his line is one of those that often is troublesome through no fault of his or the ISP), so if he's about maybe he would respond.
>> Sky/Easynet are a LLU at my Exchange
Yes... UKO and Sky use the same Easynet backhaul, but they have different products/pricing and support staff.
IIRC Easynet CS are based somewhere in the UK as the ones Ive spoken to have either been scottish/irish or english.
Just bear in mind though that due to the length of your line that you wont get the higher speed products, and you will most likely have interleaving applied.
IMHO out of the LLU suppliers you have available UKO/Sky are probably the best option.
If you wanted to stay IPStream, then there are several ISPs who have good UK support too.