Draytel are selling 2 of their ATAs for the price of one http://www.draytel.org/vigortalk_2for1.html . That's £15 each. Each one should come with a £2 voucher to use when you sign up, bringing the cost down to £13 each. And if you quote 836612 as a reference when you sign up, you'll get another £2 of credit. For £11 each, no monthly charge, it's a quality service with a normal telephone number, for anywhere in the UK, answering machine and many other benefits. Not a bad way to trial VOIP. (IMHO of course!) www.draytel.org is the main website.

Are they tied to DrayTel ? Dosh down the drain if they are and you decided to switch provider

Yes, they are tied to Draytel, who I find OK, but for this money they must be being subsidised. A cheap second line for you and a friend, and calls between them could be completely free (VoIP to VoIP). Once you've set up one account, you can use that one as a referral for the second, saving another £2. Now that's (sort of) £10 each if you include all the discounts... And you get the required lead and adaptor thrown in!