[ubuntu-uk] Asterisk friendly VoIP providers in UK

[Rob Beard]

Hi folks,

I'm looking at building myself an Asterisk box so I can learn more on 
how it works and also help provide a cheaper phone solution to one of my 
clients (it's kind of a favour I'm doing them as part of the service 
contract I am providing them).

Now traditionally I've used Vonage with their pre-configured boxes (in 
fact I'm going to get myself another Vonage box in the next couple of 
days).  I just wondered though if anyone could recommend a VoIP provider 
(is it a SIP provider?) that supports Asterisk, doesn't have a minimum 
monthly charge or super expensive call charges?

Ta,

Rob