1) One line.
2) £12 a month (including VAT) for the line rental (see below for total).
This is not the cheapest. As others have said, Be might be your better option. I went with A&A only because I had specific requirements that Be can't fulfil (like IPv6).
A&A are more a niche/business ISP, and I've had no issues with them at all. It is, as they say, no frills broadband, literally.
I am currently being charged for:
* Line Rental - £10.
* Broadband on a 21CN connection - £10.17
* 2 base units of bandwidth allowance per month - £6.00
VAT for the above is: £5.23
Total per month: £31.40
You will always have to pay something for line rental, as this is the physical medium your broadband works over. There's no getting out of that one.
The bonus in my setup is, however, I do not have to deal with BT for any line fault. That is purely dealt with by A&A (who pass the buck to BT). Suits me down the ground, as I honestly have no interest in speaking with BT (personal preference).
Regarding units, they meter this differently depending on time of day. Further information about that is on their site.
Edited by deleted (Mon 06-Jun-11 18:55:18)