Bus, yes.
Go to
http://www.thinkbroadband.com/
Good dedicated site. You can check and maintain a graph of line speeds, you can joy a forum and seek advice.
My TT speed is supposed to be upto 8mbps. According to the forum line check I could get 5.67mbs. TT deliver just 1.8Mbps but this seems par for the course.
You need to hit the Indian gentleman or lady in Bangladesh very firmly with all the numbers having run speed tests several times throughout the day, first thing, schools out, watershed, that sort of thing.
As for unbundling, forget it. I will continue to have to pay £10/m for BB until IC21 is rolled out in Q3 or 4 of next year. Dont know what IC21 is? Go to that website.