Confused about Pro

[#1]

http://community.plus.net/21cn-exchange-availability/ is a good start and if you don't know your exchange code try this first http://www.samknows.com/broadband/search.php

[#2]

Indeed. Silly of me to think that the big purple link on the home page entitled "Check Availability" would actually, you know, let me check availability ...

[#3]

BT have started digging-up the paths near me and rolling out 21CN at last! Don't know how long it will take but my current product is BBYW2 which I have been on for a long time and happy with.
As I don't wish to change product but would like to avail. of maximum line speed available will Plusnet be offering 'upto' 24Mbps to me?
I understand PAYG (even older product that I transferred from to BBYW) allows for maximum line speed.
TIA