Ok I think considering the limited choice, ultimately I will have to bite the bullet and choose one. I have pretty much narrowed my choices down to Vivaciti's ADSL2+ Variety LLU package which as far as I know and of which I think RobertoS was pointing out, runs via TalkTalk. Also Vivaciti's LLU Unlimited of which is via C&W and apparently by default, has interleaving disabled. They can manually adjust the snr aswell if required. I shall enquire directly with Vivaciti to clarify exactly what they are able to offer and make a decision from there. One thing that is very puzzling to me, and forgive my ignorance (I have always received cable broadband) adsl is new to me. My line was installed on 15/02/2012 and a line check on BT Wholesale the day after said I could receive an adsl2+ service between 18-22mb, now however it is reading as follows.
THE BROADBAND AVAILABILITY CHECKER
For Telephone Number 01273683*** on Exchange KEMPTOWN
Your exchange is ADSL enabled, and our initial test on your line indicates that your line should be able to have an ADSL broadband service that provides a fixed line speed up to 512Kbps. However, due to the length of your line, an engineer visit may be required, who will, where possible, supply the broadband service.
Our test also indicates that your line currently supports an estimated ADSL Max broadband line speed of 1Mbps; typically the line speed would range between 750Kbps and 3.5Mbps.
Our test also indicates that your line currently supports an estimated ADSL2+ broadband line speed of 6Mbps; typically the line speed would range between 5Mbps and 7Mbps. Our test also indicates that your line could support an estimated ADSL 2+ Annex-M broadband upstream line speed of 500Kbps and downstream line speed of 6Mbps; typically the downstream speed would range between 5Mbps and 7Mbps.
The actual stable line speed supportable will be determined during the first 10 days of use. This speed may change over time, to ensure line stability is maintained.
If you decide to place an order, a further test will be performed to confirm if your line is suitable for the service you wish to purchase.
Thank you for your interest.
Please note that postcode and address check results are indicative only. Most accurate results can be obtained from a telephone number check.
I am less than 300m from the exchange so I would expect much faster speeds than the above. I know the line has not been active 10 or more days yet to give a more conclusive result, but do you think these are the max speeds I will get?