mrk said:considering this is a newly fitted BT phone line there is no reason why 16MB should not be possible.
Well, you state that you're likely to see over 8mbit so you have nothing to worry about.
But, as a side note the fact that the line is new doesn't necessarily mean anything - the length of the line from the exchange is what actually matters. It might be worth checking on Samknows or something to get an idea of how far you are from your exchange - this should give you a very rough idea of what kind of length your line is.