Just been onto plusnet my provider to talk about the info that came up as listed on the samknows page, a sub page led me to believe that I could have a 20mb connection under 2 of thier various packes, seems this is not the case currently.
They mentioned BT 21CN which is not surrently available at my exchange and no known date for when it is.
So anyone wanting to update, then do your homework carefully and dont upgrate 1st with out checking all details. 
Samknows has no reason to lie as they are independant and there data i belive is supplied by BT who own the exchanges so they would gain nothing by lying ..... perhaps " YOUR " provider doesnt want to switch you to a better service and save there bandwidth...... what exchange are you on 
Didnt say they were lying, the point started regards LLU, when I checked samknows showed the LLU options I posted above, I then clicked on options under my postcodeand was told otherwise by Plusnet (Owned bt BT) So as you say, the lies may well be from plusnet. Am sure TB will be able to advise better as I dont understand bugga all about it.
But if I did swap, then my Peak time from 4pm to midnight (20GB Peak) and totally unlimited upto 8nb changes to Peak time of 8am to midnight : 20mb (Upto) so I lose 8 hours off peak but gain double + on speed and 80GB peak bandwidth abd save a fiver a month. Need to readmore into.
But had a stroppy sod on the phone, when I told him I was a premium account and moaned I was supposed to ne max speed, he told me my agreement was for upto 8mb. He was too happy when when I told I was 1 of the 1st 100 customers with plus net and went for the best service from the start Which was what I wanted, when I wanted as often as I wanted at the max speed available.
To a degree, they have chipped away at the original agreement, upto 8mb I get 7.2mb, I hardly use it these days but when I do I just max it from midnight to 4PM for the hell of, why, coz thats what my package allows.
Plusnet actually booted a load of users classed as the top 0.1% as they maxed the bandwidth, At the time I tested it on the news groups for 6/8 weeks and reckon I was at least one of the 0.1%. When I phoned them and said the above, they said I was not tagged and I believe the reason was because of the package I pay for and dont hesitte to max for a couple of months a year.
I dont pirate or even wtite DVD's I just get what I want and make the most of it, mainly american wrestling.
But I am beginning to wonder what isthe best package to actually be on especially now that I am considering hooking a TV or 2 up to the net.
Decisions, I hate them. If it wasnt for having to pay £122.50 and £11.50 a month plus an ISP charge I would be happy to pay for a second ISP if there was not the install and BT rentall on top.